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  • 1.
    Abadi, Imam
    et al.
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Hardiana, Tiara Oktavia
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Imron, Chairul
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Fitriyanah, Dwi Nur
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Jani, Yahya
    Linnéuniversitetet, Institutionen för biologi och miljö (BOM), Sweden.
    Abdullah, Kamaruddin
    Darma Persada University, Indonesia.
    Design of Adaptive Neuro-Fuzzy Inference Control Based One-Axis Solar Tracker on Battery Charging System2020Ingår i: E3S Web of Conferences, EDP Sciences , 2020, s. 1-15, artikel-id 00015Konferensbidrag (Refereegranskat)
    Abstract [en]

    The photovoltaic (PV) panel can produce electrical energy that is very environmentally friendly and easy to use. The use of PV panels is suitable for supplying peak loads or at night using batteries as energy storage. However, the battery needs to manage for control, and the battery can last long. The solution to battery management problems is through research about the battery charging system. The DC-DC converter used is the Single Ended Primary Inductance Converter (SEPIC) type. Voltage Control of the battery charging using Adaptive Neuro-Fuzzy Inference System (ANFIS). In the simulation of bright conditions, ANFIS controls can track the charging point set point and obtain a voltage response with a rise time of 0.0028 s, a maximum overshoot of 0.027 %, a peak time of 0.008 s, and a settling time of 0.0193 s. When charging a solar tracker, PV battery gets a 0.25 % increase compared to a fixed PV panel. PV solar tracker can follow the direction of the sun's position. The irradiation value and maximum temperature affect the input voltage and input current that enters the converter. 

  • 2.
    Abadi, Imam
    et al.
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Uyuniyah, Qurrotul
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Fitriyanah, Dwi Nur
    Institut Teknologi Sepuluh Nopember, Indonesia.
    Jani, Yahya
    Linnéuniversitetet, Institutionen för biologi och miljö (BOM), Sweden.
    Abdullah, Kamaruddin
    Darma Persada University, Indonesia.
    Performance Study of Maximum Power Point Tracking (MPPT) Based on Type-2 Fuzzy Logic Controller on Active Dual Axis Solar Tracker2020Ingår i: E3S Web of Conferences, EDP Sciences , 2020, s. 1-16, artikel-id 00016Konferensbidrag (Refereegranskat)
    Abstract [en]

    World energy consumption increases with time, so that occur an energy imbalance. Many breakthroughs have developed to utilize renewable energy. The photovoltaic system is one of the easy-to-use renewable energies. The power conversion from PV fixed is still low, so the PV system is designed using the active dual-axis solar tracker. The PV tracker position can be adjusted to change the sun position to get maximum efficiency. The active dual-axis solar tracker system is integrated with the maximum power point tracking (MPPT) algorithm to keep PV operating at a maximum power point even though input variations change. The active dual-axis solar tracker system integrated with the maximum power point tracking (MPPT) algorithm to keep PV operating at a maximum power point even though input variations change. Tracking test simulation had done by comparing the output power of a fixed PV system with the active dual-axis solar tracker. Type-2 fuzzy logic based MPPT successfully increased the average output power by 10.48 % with the highest increase of 17.48 % obtained at 15:00 West Indonesia Time (GMT+7). The difference in power from a fixed PV system with the active dual-axis solar tracker of 36.08 W is from the output power worth 206.3 to 242.4 W. 

  • 3.
    Abas, N.
    et al.
    University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan.
    Kalair, A. R.
    COMSATS University Islamabad, Islamabad, Pakistan.
    Seyedmahmoudian, M.
    Swinburne University, Australia.
    Naqvi, M.
    Karlstad University.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Khan, N.
    COMSATS University Islamabad, Islamabad, Pakistan.
    Dynamic simulation of solar water heating system using supercritical CO2 as mediating fluid under sub-zero temperature conditions2019Ingår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 161, artikel-id 114152Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 is becoming increasingly important as a mediating fluid, and simulation studies are indispensable for corresponding developments. In this study, a simulation-based performance investigation of a solar water heating system using CO2 as a mediating fluid under sub-zero temperature condition is performed using the TRNSYS® software. The maximum performance is achieved at a solar savings fraction of 0.83 during July. The as lowest solar savingss fraction of 0.41 is obtained during December. The annual heat production of the proposed system under Fargo climate is estimated to be about 2545 kWh. An evacuated glass tube solar collector is designed, fabricated and tested for various climate conditions. Moreover, a detailed comparison of the system's performance at sub/supercritical and supercritical pressures shows that the annual heat transfer efficiency of the modeled system is 10% higher at supercritical pressure than at sub/supercritical pressures. This result can be attributd to the strong convection flow of CO2 caused by density inhomogeneities, especially in the near critical region. This condition resuls in high heat transfer rates.

  • 4.
    Abbas, Anwar
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Faruk Acar, Ömer
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Simulation as an Enabler for ProductionSystem Development within the Indoor Vertical Farming Industry2023Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    With the increase in food consumption, new ideas, and technologies began to be developed. Inaddition, the developments generated by Industry 4.0 technologies have started to be applied tothe entire manufacturing sector and the indoor farming industry, which is currently trending.Many studies and articles have been prepared on this subject, and the main goal of each study isto produce quality products and to ensure continuity in production to cover the nonendingincrease in demand.

    This paper discusses how simulation technology, which is one of the industry 4.0 technologies,can be used in the production system development of the indoor farming industry. According tomany researchers, the biggest obstacle for the vertical farming industry is start-up cost, andsimulation technologies can be the solution for this since it allows future production systems tobe analyzed without any investment. To have a clear vision of how these technologies can beadapted in the indoor farming industry, this paper will find the answers to these questions, RQ1:How can simulation facilitate production system development and Industry 4.0 projects withinthe indoor farming industry? RQ2: What are the benefits and challenges when using simulationas a tool for production system development within the indoor farming industry? To reach thegoal of this paper, the case study method was used, and an indoor farming company was selectedto get more realistic data about the vertical farming system. BlueRedGold AB is a start-upcompany in the indoor farming industry, and it has a huge growth potential since they aim totransform its current production lines to be fully automated. Many articles and studies were usedto approach the solution of the research questions from a more technical and academic point ofview, and the analysis of these articles was carried out with the structured literature review method.

    After conducting this research, answers have been obtained for the research questions. Theauthors' solution to the layout issue, one of the case company's main challenges as indicated inthis study, was developed after extensive simulation model testing. As highlighted in this paper,it has been stated by many researchers, there are several simulation approaches to follow.However, the authors have developed a simulation modeling approach to be followed in theindoor vertical farming industry to overcome the complexity of these systems as well as thesimulation program complexity. In addition, several challenges and benefits have beenhighlighted in this paper such as the lack of ready models of the equipment used in indoorfarming which requires a knowledge of a programing language to overcome. Finally, despitechallenges, simulation technology can provide an applicable solution for production systemproblems of vertical farming companies/organizations to obtain continuous improvementphilosophy which is the main principle of Lean thinking. The generated simulation model in thisthesis project was successfully implemented, demonstrating how this technology might be aneffective solution for complex production systems as in the indoor farming sector. 

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  • 5.
    Abdelkarim, Sofia
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Hasan Hawre, Hazhwan
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Kartläggning av ergonomin i en produktionscell: Med utformningsförslag för en ergonomisk arbetsplats2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    ABSTRACT

    Purpose: The aim of the work is to map the ergonomics in a production cell and propose and compare the solutions to identified problems. In order to identify the problem and come up with some solutions, these questions have been answered.• What factors lead to operations that are harmful to the body?• How can a production cell be designed to be more ergonomic for employees?• What are the advantages / disadvantages of ergonomics in a production company?

     

    Method: To perform the study and achieve the purpose of the work, the authors used a case study company where observations were made in parallel with a literature review mainly on ergonomics variety of analysis and quality. The case study company has been used as the basis for the case study where ergonomics are mapped by means of observations, interviews and data that were analyzed by means of literature study done in parallel.

    Study results: The study resulted in a survey of ergonomics in a production cell at the case study company and 5 different suggestions for improvement. The production cell on the case study company is a red cell today, which means that the production cell is in a non-accepted position and in need for urgent changes in ergonomics. Factors leading to bad ergonomics and a non-accepted position as Volvo's requirements have been identified. Many heavy lifting and many torque is what has the highest negative impact on the working environment and ergonomics. Lack of adequate lifting tools have led to those not used in the production cell today. This leads to repetitive work and encumbrance at the case study company. Further, also the working height of the paths contributed to an increased workload as operators are in an unnatural posture. All of these factors are the basis of the 5 suggestions for improvement as the study also resulted in. New custom lifting tools, job rotation, reverse the order of the court, new packaging and pallet to the gears and the robot turn. All these proposed solutions lead to reduced stress and improved ergonomics in the production cell as manual lifting and twists are reduced. The solutions also leads to the production cell shifting from a non-accepted position with demands of urgent change to a yellow production cell that requires an action plan for the future.

     

    Implications: The aim of this study was to map the ergonomics in a production cell. With the study in hand, a conclusion is drawn that the aim has been achieved when all three of the questions have been addressed. Factors leading to poor ergonomics are identified. As well the advantages and disadvantages of investing in ergonomics identified and how production cells should be formed. With this information in mind, a number of proposed solutions have been developed.

     

    Recommendations: Further studies on the subject are recommended to increase knowledge and interest. It may be appropriate to carry out more case studies at more industries to strengthen the study’s results and generalizability. Furthermore, studies are recommended where the entire work environment is studied and not only physical ergonomics. By studying the whole working environment and the many factors that interact it can lead to a greater force being created for higher efficiency and quality in production.

     

    Keywords: Ergonomics, Ergonomics, Work, Volvo CE, Load, Lifting Tools, Body Injury, Advantages, Improvements, Quality

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  • 6.
    Abdelshafy, Alaaeldin M.
    et al.
    Egypt Japan Univ Sci & Technol, Energy Resources Eng Dept, Alexandria, Egypt.;Assiut Univ, Fac Engn, Elect Engn Dept, Assiut, Egypt..
    Jurasz, Jakob
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik, Framtidens energi. AGH Univ Sci & Technol, Fac Management, Dept Eng Management, Krakow, Poland..
    Hassan, Hamdy
    Egypt Japan Univ Sci & Technol, Energy Resources Eng Dept, Alexandria, Egypt.;Assiut Univ, Fac Engn, Mech Engn Dept, Assiut, Egypt..
    Mohamed, Abdelfatah M.
    Assiut Univ, Fac Engn, Elect Engn Dept, Assiut, Egypt.;Egypt Japan Univ Sci & Technol, Dept Mechatron & Robot Engn, Alexandria, Egypt..
    Optimized energy management strategy for grid connected double storage (pumped storage-battery) system powered by renewable energy resources2020Ingår i: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 192, artikel-id 116615Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a grid-connected double storage system (DSS) consisting of pumped-storage hydropower (PSH) and battery. The system is supplied by photovoltaics and wind turbines. In the proposed hybrid system, batteries absorb excess renewable energy that cannot be stored in PSH and they cover loads that cannot be supplied from the water turbine. To improve the system performance, a novel energy management strategy for the DSS is proposed. The strategy is based on an optimized factor that governs the charging process of the DSS. The problem of the optimal system design is solved by a non-dominated sorting genetic algorithm (NSGA-II). The multi-objective function considers simultaneously the minimal investment cost and minimal CO2 emissions. A comparative study of photovoltaic/wind/pumped-storage hydropower and photovoltaic/wind/double storage system is performed to show the effectiveness of the proposed strategy in terms of system economic and environmental performance. The considered location of the PSH station is on Attaqa Mountain at Suez (Egypt). The results indicate the effectiveness of the proposed energy management strategy for the storage system from economic and environmental perspectives. Coupling the battery with the PSH reduces the electricity cost by 22.2% and results in minimal energy exchange with the national grid (5% of the annual demand). A sensitivity analysis shows the largest variation of the electricity cost with changing the capital cost of the solar and wind generators. Also, it is observed that when the load increases, the optimal size of the system components increases, but it isn't proportional with the demand increase as could be expected. (C) 2019 Elsevier Ltd. All rights reserved.

  • 7.
    Abid, Ali
    et al.
    Mälardalens högskola, Institutionen för innovation, design och produktutveckling. Mälardalens högskola, Akademin för innovation, design och teknik.
    Roback, Joel
    Mälardalens högskola, Institutionen för innovation, design och produktutveckling.
    Produktutveckling för Cate & Nelson Design: Framtagning av möbel2008Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats/Examensarbete
    Abstract [sv]

    Denna rapport behandlar examensarbete utfört för industridesignföretaget Cate & Nelson Design. Företaget ligger i Eskilstuna och jobbar i huvudsakligen med möbeldesign och inredningsprodukter. Projektgruppensuppgift har varit att ta fram en ny möbel för företaget och arbetet har omfattat utveckling av hela produkten från idé till prototyp.

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    FULLTEXT01
  • 8.
    Abu Hawwach, Mohammed
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Human errors in industrial operations and maintenance2021Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Within maintenance activities and industrial operations, human is subjected to different kind of stresses and situation that could result in mistakes and accidents. The human errors in maintenance and manufacturing are an unexplored latter such that a little focusis invested in this area. The report aims to widen up the understanding of the human error in maintenance and manufacturing area. Aviation and marine operations are the most sectors that are subjected to human errors according tothe literature. There aredifferent types of human error that have effect on quality and overall effectivity. Human reliability models are one method to quantify human errors and usually used for the identification of human errors and HEP calculation. The most common reliability measurement methods are HEART, THERP and SLIM which are used depending on application and industry. As a part of efforts to define differences between those reliability models, literature including different industries is used and itis found that expert judgement influences the success and accuracy of such methods. There are many causes for human errors depending on the application but, communication and procedures followed are the most contributing factors. There is always a probability of existence of human errors as the mistake done by workers are inevitable. Industry 4.0 can help in decreasing human errors through the introduction of operator 4.0 as well as other approaches like training and upgrading organizational standards.

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  • 9.
    Achi, Raghukulesh
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Exploring value proposition of service offerings in telematics system2018Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Services are making a huge impact in the business sector especially in the developed countries. As services are customer-centric, there is a need for an enhanced process framework connected to integrated service development. Such a framework should ideally address value propositions meeting specific customer needs in identifying corresponding service offerings. In this context, this thesis aims to explore on how value propositions are defined, developed, and communicated during the introduction of service offerings and to identify the ways to improve the process of value propositions. The work is carried out in the context of a major (Swedish) manufacturing company within a specific product context, namely, the telematics system. The main data collection methods are personal observations, semi-structured interviews, meetings, and company documents. The study seeks to answer three questions: First, what are the value propositions addressed by the current service offerings in telematics system in the context of heavy-duty vehicle equipment? Second, how value propositions are created during the development of these services offerings? Third, how can the service offerings for telematics system be improved through the process of value proposition? The study found that two types of value propositions namely customer value proposition and stakeholder value proposition are addressed by the service offerings in telematics system. Additionally, it is found that value propositions are created in relation to service offerings. Finally, the thesis proposes a six-step conceptual framework to create better value propositions during the development of service offerings. The presented framework is applied to the current value proposition process at the case company and improvement suggestions are proposed, which can impact the service offerings in the near future. The thesis has contributions to enhance or create new service offerings through addressing the value propositions and applying them. The results are beneficial for managers and developers who work in developing the future state scenarios or business models.

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    Master Thesis
  • 10.
    af Klinteberg, Ludvig
    et al.
    KTH, Sweden.
    Lindbo, Dag
    KTH, Sweden.
    Tornberg, Anna-Karin
    KTH, Sweden.
    An explicit Eulerian method for multiphase flow with contact line dynamics and insoluble surfactant2014Ingår i: Computers & Fluids, ISSN 0045-7930, E-ISSN 1879-0747, Vol. 101, s. 50-63Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The flow behavior of many multiphase flow applications is greatly influenced by wetting properties and the presence of surfactants. We present a numerical method for two-phase flow with insoluble surfactants and contact line dynamics in two dimensions. The method is based on decomposing the interface between two fluids into segments, which are explicitly represented on a local Eulerian grid. It provides a natural framework for treating the surfactant concentration equation, which is solved locally on each segment. An accurate numerical method for the coupled interface/surfactant system is given. The system is coupled to the Navier-Stokes equations through the immersed boundary method, and we discuss the issue of force regularization in wetting problems, when the interface touches the boundary of the domain. We use the method to illustrate how the presence of surfactants influences the behavior of free and wetting drops.

  • 11.
    af Klinteberg, Ludvig
    et al.
    KTH, Sweden.
    Sorgentone, Chiara
    KTH, Sweden.
    Tornberg, Anna-Karin
    KTH, Sweden.
    Quadrature error estimates for layer potentials evaluated near curved surfaces in three dimensions2022Ingår i: Computers and Mathematics with Applications, ISSN 0898-1221, E-ISSN 1873-7668, Vol. 111, s. 1-19Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The quadrature error associated with a regular quadrature rule for evaluation of a layer potential increases rapidly when the evaluation point approaches the surface and the integral becomes nearly singular. Error estimates are needed to determine when the accuracy is insufficient and a more costly special quadrature method should be utilized.& nbsp;The final result of this paper are such quadrature error estimates for the composite Gauss-Legendre rule and the global trapezoidal rule, when applied to evaluate layer potentials defined over smooth curved surfaces in R-3. The estimates have no unknown coefficients and can be efficiently evaluated given the discretization of the surface, invoking a local one-dimensional root-finding procedure. They are derived starting with integrals over curves, using complex analysis involving contour integrals, residue calculus and branch cuts. By complexifying the parameter plane, the theory can be used to derive estimates also for curves in R3. These results are then used in the derivation of the estimates for integrals over surfaces. In this procedure, we also obtain error estimates for layer potentials evaluated over curves in R2. Such estimates combined with a local root-finding procedure for their evaluation were earlier derived for the composite Gauss-Legendre rule for layer potentials written in complex form [4]. This is here extended to provide quadrature error estimates for both complex and real formulations of layer potentials, both for the Gauss-Legendre and the trapezoidal rule.& nbsp;Numerical examples are given to illustrate the performance of the quadrature error estimates. The estimates for integration over curves are in many cases remarkably precise, and the estimates for curved surfaces in R-3 are also sufficiently precise, with sufficiently low computational cost, to be practically useful.

  • 12.
    af Klinteberg, Ludvig
    et al.
    KTH, Sweden.
    Tornberg, Anna-Karin
    KTH, Sweden.
    Fast Ewald summation for Stokesian particle suspensions2014Ingår i: International Journal for Numerical Methods in Fluids, ISSN 0271-2091, E-ISSN 1097-0363, Vol. 76, nr 10, s. 669-698Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We present a numerical method for suspensions of spheroids of arbitrary aspect ratio, which sediment under gravity. The method is based on a periodized boundary integral formulation using the Stokes double layer potential. The resulting discrete system is solved iteratively using generalized minimal residual accelerated by the spectral Ewald method, which reduces the computational complexity to O(N log N), where N is the number of points used to discretize the particle surfaces. We develop predictive error estimates, which can be used to optimize the choice of parameters in the Ewald summation. Numerical tests show that the method is well conditioned and provides good accuracy when validated against reference solutions. 

  • 13.
    Afrim, Amanda
    et al.
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik.
    Kling, Jennifer
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik.
    UTVECKLING AV DEBITERINGSSYSTEM FÖR REDUCERING AV ENERGIANVÄNDNING: Uppdrag av Saab AB, Linköping2022Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The purpose of this master thesis is to develop a billing system for Saab's energy use and to study the possibilities for improving energy efficiencies. The billing system is based on collected measurement data and is divided into different categories. Obtained measurement data refer to one year in a pandemic between the years 2020 and 2021, which affects the results due to employees working from home as offices are closed. Furthermore, energy use must be normalized to be able to compare the energy use despite the temperature difference each month. Thereafter, normalized energy use is divided with the area for each house. The average value calculated for offices is 133 kWh/m2 compared to the general average value at 110 kWh/m2 and entails a high cost. The swingtherm plant consumes the most energy per square meter, over 2000 kWh/m2. The billing system is developed in Excel and implemented in Space. The billing model affects all internal tenants within Saab's operations. The possibilities for improving energy efficiencies have been studied and analyzed. Effective measures that are highlighted is an increased awareness, a change in the individual's behavior, integration of drill hole system, FTX system and installation of heat recovery and LED lights.

  • 14.
    Agerskans, Natalie
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    A Framework for Achieving Data-Driven Decision Making in Production Development2020Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Industri 4.0 och utvecklingen av nya digitala teknologier tvingar tillverkningsföretag att introducera drastiska förändringar i sina produktionssystem. Dessa teknologier skapar unika möjligheter för tillverkningsföretag att samla, processa och lagra stora datavolymer, vilka kan användas för att stödja koordineringen av fabrikselement. Tidigare forskning indikerar att beslut baserade på data kan innebära faktabaserade beslut vilket kan bidra till en ökad produktivitet. Tillverkningsföretag utnyttjar dock inte data som underlag för beslutsfattande, vilket är önskvärt för en ökad konkurrenskraft. I dagsläget är mycket uppmärksamhet riktat mot teknologier istället för de människor som är ansvariga för att tolka data och fatta beslut. Dessutom saknas ledning gällande hur tillverkningsföretag kan gå från nuvarande beslutsrutiner (exempelvis beslut baserade på magkänsla) till faktabaserade beslut på data. Syftet med detta examensarbete är därför att föreslå ett ramverk för att åstadkomma data-baserade beslut genom produktionsutveckling i ett Industri 4.0 kontext. Syftet har uppnått genom en kvalitativ fallstudie på litet och mellanstort företag i elektronikindustrin. Resultaten påvisar att både utmaningar och möjliggörare för att åstadkomma databaserade beslut i produktionsutveckling är relaterade till perspektiv och attityder, processer för datakvalitet, teknologi och processer för beslutsfattande. Fyra olika mognadsnivåer för data-baserade beslut har också identifierats. Det föreslagna ramverket för databaserade beslut kan användas av tillverkningsföretag i syfte att hjälpa dem planera och förbereda sig för deras egna specifika utvecklings mot databaserat beslutsfattande. Genom att bidra till nuvarande kännedom avser detta examenarbete de mänskliga beslutsfattarnas perspektiv gällande utveckling at förmågan att samla, processa, analysera och använda datan för att stödja tidseffektiva och högkvalitativa beslut. Detta är en insikt som saknas i tidigare akademiska studier. Framtida studier kan inkludera verifiering av resultaten presenterade i detta examensarbete med fler tillämpningsområden och typer av industrier.  

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    Agerskans (2020) - A Framework for Achieving Data-Driven Decision Making in Production Development
  • 15.
    Agerskans, Natalie
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Digital Technologies for Enabling Smart Production: Examining the Aspects of Selection and Integration2023Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Med utvecklingen mot Industri 5.0 utvecklas tillverkningsföretag mot smart produktion. I smart produktion används data som en resurs för att koppla samman olika element i produktionssystemet i syfte att lära sig om och anpassa sig efter förändrade produktionsförhållanden. Vanliga mål för smart produktion inkluderar resurseffektivitet, och en hållbar produktion anpassad utifrån människan. För att åstadkomma dessa önskade fördelar, behöver tillverkningsföretag använda digitala teknologier för att skapa och hantera hela dataflödet. För att möjliggöra smart produktion är det viktigt att implementera digitala teknologier på ett sätt så att insamlad rådata omvandlas till användbar data som kan tillämpas av maskiner eller människor för att skapa värde eller minska slöseri i produktionen. Detta kräver hänsyn till dataflödet inom produktionssystemet, det vill säga hela processen att omvandla rådata till användbar data som inkluderar datahanteringsaspekter som exempelvis insamling, analys och visualisering av data. För att möjliggöra ett bra dataflöde krävs det att flera digitala teknologier kombineras. Många tillverkningsföretag står dock inför flera utmaningar när de ska välja lämpliga digitala teknologier för sitt specifika produktionssystem. Vanliga utmaningar är relaterade till det överväldigande antalet avancerade digitala teknologier som finns på marknaden, samt komplexiteten hos produktionssystem och digitala teknologier. Detta gör det till en komplex uppgift att förstå vilka digitala tekniker som ska väljas och vilka resurser och åtgärder som behövs för att integrera dem i produktionssystemet.

    Mot denna bakgrund är syftet med denna licentiatuppsats att undersöka hur tillverkningsföretag ska välja och integrera digitala teknologier för att uppnå smart produktion. Mer specifikt så undersöker denna licentiatuppsats vilka utmaningar och kritiska faktorer som finns för att välja och integrera digitala teknologier för att uppnå smart produktion. Detta uppnåddes genom en kvalitativ multipel fallstudie med tillverkningsföretag inom olika branscher och av olika storlekar. Resultaten visar att identifierade utmaningar och kritiska faktorer är relaterade till de olika faserna av datavärdekedjan: datakällor och insamling, datakommunikation, databearbetning och lagring samt datavisualisering och användning. Generella utmaningar och kritiska faktorer som var relaterade till alla faser av datavärdekedjan identifierades också. Dessutom var utmaningarna och kritiska faktorerna relaterade till människa, process och tekniska aspekter. Detta visar att det finns ett behov av helhetsperspektiv på hela datavärdekedjan och olika element i produktionssystemet när digitala teknologier väljs och integreras. Dessutom finns det ett behov av att definiera en strukturerad process för val och integration av digital teknik, där både ledning och operativ nivå är involverade.

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  • 16.
    Agerskans, Natalie
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Ashjaei, Seyed Mohammad Hossein
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system.
    Bruch, Jessica
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Chirumalla, Koteshwar
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Critical Factors for Selecting and Integrating Digital Technologies to Enable Smart Production: A Data Value Chain Perspective2023Ingår i: IFIP Advances in Information and Communication Technology, Springer Science and Business Media Deutschland GmbH , 2023, s. 311-325Konferensbidrag (Refereegranskat)
    Abstract [en]

    With the development towards Industry 5.0, manufacturing companies are developing towards Smart Production, i.e., using data as a resource to interconnect the elements in the production system to learn and adapt accordingly for a more resource-efficient and sustainable production. This requires selecting and integrating digital technologies for the entire data lifecycle, also referred to as the data value chain. However, manufacturing companies are facing many challenges related to building data value chains to achieve the desired benefits of Smart Production. Therefore, the purpose of this paper is to identify and analyze the critical factors of selecting and integrating digital technologies for efficiently benefiting data value chains for Smart Production. This paper employed a qualitative-based multiple case study design involving manufacturing companies within different industries and of different sizes. The paper also analyses two Smart Production cases in detail by mapping the data flow using a technology selection and integration framework to propose solutions to the existing challenges. By analyzing the two in-depth studies and additionally two reference cases, 13 themes of critical factors for selecting and integrating digital technologies were identified.

  • 17.
    Agrell, Filip
    et al.
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik.
    Ablay, Agit
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik.
    Developing an innovative unit of power supply to improve the sustainability of data centers: A techno economic analysis of replacing diesel generators with fuel cells as backup power generation for data centers2022Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    As the amount of data centers continues to increase, their electricity consumption and emissions are being reviewed. The current backup solution is a conventional diesel generator running on fossil fuels. As part of climate goals to reduce carbon emissions, renewable energy sources like fuel cells running on hydrogen are being considered. The following degree project aims to analyse the impact of replacing a fossil-powered backup power system with fuel cells as well as providing insights into which parameters affect the economic analysis the most. Current studies, reports and websites were used to gather a better understanding of fuel cell systems and their key components. The calculations were carried out using values obtained from literature which then were used for simulations in Excel. The results indicated a net profit for the proposed fuel cell system during the expected lifetime. A proton exchange membrane fuel cell (PEMFC) functions very similarly to a diesel generator while reducing emissions. While the operating costs for the conceptual FC system are lower, the initial investment is much more expensive compared to the diesel system. Even though the economic investment yields a negative profit, large carbon dioxide savings are made. To give a better understanding of how different aspects impact the economics a sensitivity analysis was also carried out. While the current results show that the investment is not feasible, many of the parameters analysed in the sensitivity analysis indicate a more hopeful future forecast.  

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    Thesis_Ablay_Agrell
  • 18.
    Ahlqvist, Nicolin
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Rydh, Mathilda
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Valideringssystem för diskmaskin inom vården2015Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta arbete har tagit upp frågan om hur ett valideringssystem inom vården skulle kunna fungera på bästa sätt samt dess design

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    fulltext
  • 19.
    Ahlskog, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Prerequisites that support the fuzzy front end of manufacturing technology development2017Ingår i: 24th EurOMA conference EurOMA17, 2017Konferensbidrag (Refereegranskat)
    Abstract [en]

    The overall purpose of this paper is to explore the prerequisites that support the fuzzy front end of manufacturing technology development. An exploratory multiple embedded case study has been conducted at a Swedish manufacturing company in the manufacturing industry. By studying four pilot plants’ organisational structure and way of working, this paper contributes with an increased understanding regarding how the fuzzy front end of manufacturing technology development can be supported. This paper describes how a technology roadmap, the usage of master processes and a supportive organisational structure can support the fuzzy front end of new manufacturing technology development.

  • 20.
    Ahlskog, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik. Eskilstuna.
    The fuzzy front end of manufacturing technology development: Exploring the link between the known and the unknown2017Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    It is well known that a way of competing on a global market is through the introduction of new manufacturing technologies in the production system that can improve product quality as well as contribute to reducing manufacturing time, reduced product price and in the end increased profits. Manufacturing companies that develop and introduce new manufacturing technologies can differentiate themselves from others and thus achieve increased competitiveness.

    The fuzzy front end of manufacturing technology development is characterized by a high degree of technology uncertainty and challenges due to the lack of access to relevant knowledge, lack of a structured development process, and enough resources that are working with development of new manufacturing technologies.

    In the literature only a few empirical studies that explore the fuzzy front end of manufacturing technology development can be found. Prior research highlights that little is actually known about what should be done in the fuzzy front end of manufacturing technology development projects, and thus more research is needed. Supporting the fuzzy front end of manufacturing technology development is important to facilitate a successful introduction of new manufacturing technologies, fast time-to-volume and long-term production system development.

    Based on the above-mentioned importance of developing new manufacturing technology, the objective of the research presented in this thesis is to explore the fuzzy front end of manufacturing technology development. In order to fulfil the objective, empirical data were collected from five case studies conducted in the manufacturing industry. During the empirical studies four important parts were studied: organising, knowledge development, collaboration and the development process.

    The main findings revealed that development of new manufacturing technology is often conducted in collaboration with external partners and many ad hoc decisions are taken due to lack of a predefined development process for the fuzzy front end of manufacturing technology development. In addition, in the fuzzy front end access to relevant manufacturing knowledge is important and knowledge needs to be developed in order to reduce technology uncertainty.

    In order to support the fuzzy front end of manufacturing technology development projects, a supporting framework has been developed. The proposed framework is an elaboration of results from the research questions addressed and can be used as a guideline to overcome the challenges observed in the fuzzy front end of manufacturing technology development projects. The framework is built on two important dimensions for innovations, degree of technology uncertainty and degree of novelty. The critical factors identified in the analysis are embedded in the proposed framework as central parts in the fuzzy front end of manufacturing technology development.

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  • 21.
    Ahlskog, Mats
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering. Sch Innovat Design & Engn, Eskilstuna, Sweden..
    Bruch, Jessica
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering. Malardalen Univ, Sch Innovat Design & Engn, Dept Prod Realizat, Eskilstuna, Sweden..
    Jackson, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering. Malardalen Univ, Sch Innovat Design & Engn, Eskilstuna, Sweden..
    Knowledge integration in manufacturing technology development2017Ingår i: Journal of Manufacturing Technology Management, ISSN 1741-038X, E-ISSN 1758-7786, Vol. 28, nr 8, s. 1035-1054Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - The purpose of this paper is to identify and analyze knowledge integration in manufacturing technology development projects required to build competitive advantages. Design/methodology/approach - A longitudinal case study has been conducted at a Swedish manufacturing company by following a manufacturing technology development project in real time during a two-year period. Findings - The results show that three different knowledge integration processes exist when developing unique manufacturing technology: processes for capturing, for joint learning, and for absorb learning. The findings of the current research suggest that the three knowledge integration processes are highly interrelated with each knowledge integration process affecting the other two. Research limitations/implications - The major limitation of the research is primarily associated with the single case, which limits generalizability outside the context that was studied. Practical implications - The findings are particularly relevant to manufacturing engineers working with the development of new manufacturing technologies. By using relevant knowledge integration processes and capabilities required to integrate the knowledge in manufacturing technology development projects, companies can improve design and organize the development of manufacturing technology. Originality/value - Previous research has merely noted that knowledge integration is required in the development of unique manufacturing technology, but without explaining how and in what way. This paper's contribution is the identification and analysis of three knowledge integration processes that contribute to the building of competitive advantages by developing unique manufacturing technology and new knowledge.

  • 22.
    Ahlskog, Mats
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Granlund, Anna
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Badasjane, Viktorija
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Sauter, Barrett
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Approaching digital transformation in the manufacturing industry challenges and differing views2023Ingår i: International Journal of Manufacturing Research, ISSN 1750-0591, nr 4, s. 415-433Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to support manufacturing companies in their digital transformation, challenges and views of the term 'digital transformation' need to be identified since digital transformation is considered a source of competitive advantages. Therefore, this paper aims to explore the challenges and differing views of digital transformation in the manufacturing industry. A case study was conducted in collaboration with four Swedish manufacturing companies. The results were then mapped into categories of three dimensions (people, process and technology), indicating that digital transformation can have different meanings within a company. We conclude that the term 'digitalisation' is more frequently used in the manufacturing industry than 'digital transformation' and identified challenges relate to lack of best practice for digital transformation, degree of standardisation and therefore affects the workload and limits the possibilities of transferring technical solutions between factories. Our findings are relevant to operations managers and other interested in digital transformation. 

  • 23.
    Ahluwalia, Arvind
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Computer Controlled Direct Descent2017Självständigt arbete på grundnivå (kandidatexamen), 180 hpStudentuppsats (Examensarbete)
    Abstract [en]

    How an aircraft performs its approach and descent towards an airport today has got big potential for improvements. It's mainly the environmental impact and safety that can, and must, be improved for a sustainable future in aviation. "Green Approaches" is a small, yet relatively well-known, optimized approach system mainly used by Scandinavian Airlines on Arlanda airport. Unfortunately "Green Approaches" aren't used often enough, due to the simple reason that it doesn't work very well during heavy traffic. Luckily further research is being done in this field to further optimize an aircraft’s approach. As of today, the most forward going research is being done by the FAA and NASA, and their new system is called NextGen OPD. The system is not fully developed yet but their goals are, as previously mentioned, to optimize today's aircraft approach. In this report the focus will also be set on improving aircraft approaches, although not by optimizing today’s system like the FAA and NASA. Instead, a whole new concept of how aircraft approach airports will be developed. The reason that a brand new concept will be developed is simple, optimizing today's aging system will not be sustainable for the future. Also, optimizing an aging system has its limits. By designing a whole new concept, a steady ground will be laid and it shall be sustainable for the coming century's technology. The new concept will be called ”C.C.D.D.”, Computer Controlled Direct Descent, and will have a lot of goals and expectations to fulfill. As hinted in the name, the new concept is built on the idea that a computer will be controlling the whole approach, and therefore the "Human factor" will more or less be eliminated. Although the main purpose of a new approach system is to decrease the negative environmental impact, by decreasing the fuel consumption during the approach. The new concept will also decrease the noise an aircraft makes during the descent and increase the possibility for a greater traffic flow in the airport’s airspace. The end result will be a "win-win" for everyone involved. An environmentally friendly aircraft approach is necessary for a sustainable future in aviation. C.C.D.D. is a system that will pay for itself with time, because of the decreased fuel consumption for airliners. The system also has the ability to be expanded to computer control departing aircrafts, due to the systems highly computerized structure and integration with airplanes autopilot.

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  • 24.
    Ahlén, Kritsoffer
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Rosén, Malin
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Simulering som konstruktionsstöd2013Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
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    Simulering som konstruktionssöd
  • 25.
    Ahmad, Mustafa
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Boukli, Tarék
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Continuing Airworthiness Management Exposition: For Priority Aero Maintenance2012Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The economic crisis has affected the airline industry as much as it has affected all other industries in the world. The small airlines and maintenance organisations must find new opportunities and options in order to survive the harsh crisis. Priority Aero Maintenance is now an approved maintenance organisation performing maintenance on aircrafts, engines and components. The company sees economic gains in the future by becoming an approved organisation that follows the European Aviation Safety Agency guidelines (EASA) and meets the requirements outlined in the rules of Part-M.

    In order for the company to become an approved organization, responsible for continuing airworthiness of aircraft, a handbook should be presented to the local authority. This handbook describes the company’s responsibility for the continuing airworthiness in order for the authorities to get an insight into the company and its work.

    This thesis resulted in a draft of CAME (Continuing Airworthiness Management Exposition) and this draft has been approved by Priority Aero Maintenance.

    The CAME will in the future be used by the company as a basis for developing a more detailed manual to be presented to and approved by the Swedish Aviation Authority (Transportstyrelsen).

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  • 26.
    Ahmadi, Mansour
    Mälardalens högskola, Akademin för innovation, design och teknik.
    The application of system dynamics and discrete event simulation in supply chain management of Swedish manufacturing industries2012Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Increasing competition from traditional and emerging channels has placed new emphasis on rapid innovation and continuous differentiation in every aspect of supply chain, from earliest production stage to the final distribution steps. To bridge the gap between brilliant ideas and successful business initiatives, leading companies implement engineering simulation particularly in logistics and supply chain management (LSCM). Discrete event simulation (DES) and system dynamics (SD) are two modeling approaches widely used in this field. However there are not much done researches about the applications of these simulation approaches in supply chain context of Swedish Manufacturing Industries (SMI). This study explores the application of DES and SD in LSCM of SMI by looking at the nature and level of issues modeled. Journal papers and master theses that use these modeling approaches to study supply chains, published between 1990 and 2012 are reviewed. A total of 39 articles are analyzed to identify the frequency with which the two simulation approaches are used as modeling tools in LSCM of SMI. Our findings suggest that DES has been used more frequently to model supply chains in SMI. The results also show that not all the LSCM issues have been addressed evenly and generally tactical/operational issues have been modeled more frequently. The results of this study inform the existing literature about the use of DES and SD in LSCM of SMI.

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  • 27.
    Ahmadzadeh, Farzaneh
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Ranking of Two Multi Criteria Decision Making Cases with Evidential Reasoning under Uncertainty2017Ingår i: Advances in Science, Technology and Engineering Systems Journal V2(3) ASTESJ-V2(3), ISSN 2415-6698, Vol. 2, nr 3, s. 1059-1063Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many decision problems have more than one objective that need to be dealt with simultaneously. Moreover, because of the qualitative nature of the most of real world problem it is an inevitable activity and very important to interpret and present the uncertain information for making effective decision. The Evidential Reasoning (ER) approach which is one of the latest development within multi criteria decision making (MCDM) seems to be the best fit to synthesize both qualitative and quantitative data under uncertainty. To support this claim, two case studies were tested to illustrate the application of ER for prioritization and ranking of decision alternative to support decision process even with uncertain information. The overall goal of the first case study is to identify and prioritize factors that can be considered maintenance-related waste within the automotive manufacturing industry. The result after applying ER shows “inadequate resources” and “weather /indoor climate,” respectively, are the highest and lowest average scores for creating maintenance-related waste. This prioritization methodology can be used as a tool to create awareness for managers seeking to reduce or eliminate maintenance-related waste. The aim of the second case study is to look at the possibility of having a new approach for sustainable design. So through a literature review six design strategies were taken into consideration in order to develop a new approach based on all advantages (sustainable factors) of the six approaches. For ranking and finding out about the most important factors the evidential reasoning (ER) approach is used. Based on ER all the important factors, apart from the one collected from interviews are a part of eco-design. So it means among all strategies eco-design is the most dominant strategy in term of environment. However two of the important factors are not found in any strategy but in interviews. These factors can be used as the building blocks for a new approach. The importance of having a better structured decision process is essential for the success of any organization, so it can be applied widely in most of real world problem dealing with making effective decision.

  • 28.
    Ahmadzadeh, Farzaneh
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Bengtsson, Marcus
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Classification of Maintenance-Related Waste Based on Human Factors2015Ingår i: 22nd International Annual EurOMA Conference EurOMA15, Neuchâtel, Switzerland, 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    The goal of this research is to identify and classify factors creating maintenance-related waste. A workshop study has been performed in order to identify root-causes for maintenance-related waste. In total, 16 categories were found in the analysis and it is concluded that these are heavily reliant on human factors as a root- or major contributory cause. These, together with factors based on a literature review have been incorporated into a classification model. The model can be used in creating awareness in, as well as provide a basic framework for decision making of, which waste to target for elimination.

  • 29.
    Ahmadzadeh, Farzaneh
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Bengtsson, Marcus
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Using evidential reasoning approach for prioritization of maintenance-related waste caused by human factors-a case study2017Ingår i: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 90, nr 9-12, s. 2761-2775Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The reduction and elimination of maintenance-related waste is receiving increasing attention because of the negative effect of such waste on production costs. The overall goal of this research is to identify and prioritize factors that can be considered maintenance-related waste within the automotive manufacturing industry. Five manufacturing companies participated in a workshop to identify root causes of maintenance-related waste; 16 categories were found. The identified factors were heavily reliant on human factors as a root or major contributory cause at different levels affecting performance and productivity. For prioritization, the evidential reasoning (ER) approach which is one of the latest developments in multi-criteria decision-making is applied. A basic tree structure necessary for ER assessment is developed based on the workshop results as well as literature on human factors. Then, a survey on basic attributes at the lowest level of this tree is designed and performed at one of the companies participating in the workshop. The application of ER shows that, on an overall level, "management condition" is in first order and "maintainer condition" and "working condition" are in second and third order respectively as the worst cases for creating maintenance-related waste. On the most delimited level "inadequate resources" and "weather/indoor climate" have the highest and lowest average scores respectively in ER ranking or prioritization. This methodology with its resulting ranking can be used as a tool to create awareness for managers seeking to reduce or eliminate maintenance-related waste.

  • 30.
    Ahmadzadeh, Farzaneh
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Jederström, Kathrina
    Mälardalens högskola.
    Plahn, Maria
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Olsson, Anna
    Mälardalens högskola.
    Foyer, Isabell
    Mälardalens högskola.
    AN INVESTIGATION OF THE MOST IMPORTANT FACTORS FOR SUSTAINABLE PRODUCT DEVELOPMENT USING EVIDENTIAL REASONING2017Ingår i: Numerical Algebra, Control and Optimization, ISSN 2155-3289, E-ISSN 2155-3297, Vol. 7, nr 4, s. 435-455Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Those working in product development need to consider sustain ability, being careful not to compromise the future generations ability to satisfy its needs. Several strategies guide companies towards sustainability. This paper studies six of these strategies: eco-design, green design, cradle-to-cradle, design for environment, zero waste, and life cycle approaches. Based on a literature review and semi-structured interviews, it identifies 22 factors of sustainability from the perspective of manufacturers. The purpose is to determine which are the most important and to use them as a foundation for a new design strategy. A survey based on the 22 factors was given to people working with product development; they graded each factor by importance. The resulting qualitative data were analyzed using evidential reasoning. The analysis found the factors minimize use of toxic substances, increase competitiveness, economic benefits, reduce material usage, material selection, reduce emissions, and increase product functionality are more important and should serve as the foundation for a new approach to sustainable product development.

  • 31.
    Ahmed, Mobyen Uddin
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system.
    Andersson, Peter
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Andersson, Tim
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system.
    Tomas Aparicio, Elena
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Mälarenergi AB, Sweden.
    Baaz, Hampus
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Barua, Shaibal
    Mälardalens universitet, Akademin för innovation, design och teknik, Inbyggda system. RISE SICS Västerås, Sweden.
    Bergström, Albert
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Bengtsson, Daniel
    Mälardalens högskola, Akademin för innovation, design och teknik, Inbyggda system.
    Orisio, Daniele
    State Inst Higher Educ Guglielmo Marconi, Dalmine, Italy..
    Skvaril, Jan
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zambrano, Jesus
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    A Machine Learning Approach for Biomass Characterization2019Ingår i: Energy Procedia, ISSN 1876-6102, s. 1279-1287Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this work is to apply and evaluate different chemometric approaches employing several machine learning techniques in order to characterize the moisture content in biomass from data obtained by Near Infrared (NIR) spectroscopy. The approaches include three main parts: a) data pre-processing, b) wavelength selection and c) development of a regression model enabling moisture content measurement. Standard Normal Variate (SNV), Multiplicative Scatter Correction and Savitzky-Golay first (SGi) and second (SG2) derivatives and its combinations were applied for data pre-processing. Genetic algorithm (GA) and iterative PLS (iPLS) were used for wavelength selection. Artificial Neural Network (ANN), Gaussian Process Regression (GPR), Support Vector Regression (SVR) and traditional Partial Least Squares (PLS) regression, were employed as machine learning regression methods. Results shows that SNV combined with SG1 first derivative performs the best in data pre-processing. The GA is the most effective methods for variable selection and GPR achieved a high accuracy in regression modeling while having low demands on computation time. Overall, the machine learning techniques demonstrate a great potential to be used in future NIR spectroscopy applications.

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  • 32.
    Ahmed, Zeinab
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Material och Lagerstyrningssystem2019Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Tidigare hade Husmuttern problem med att styra lagernivåer och inköpsorder, detta påverkade negativt på produktionen. Företaget hade inget effektivt system för att utföra planering och styra lagernivåer. Styrning av material och lagernivå utförs utifrån externa leverantörer. Transporten av råmaterial har planerats till varannan dag utan att ta hänsyn till fordonens uppfyllnadsnivå eller hur det påverkar transportkostnad och miljö.

    Syftet med examenarbetet är att identifiera problem och ge rekommendationer med stöd av teorier om hur ett effektivt materialplaneringssystem kan genomföras, för att öka lönsamhet, minska transportkostnad, miljöpåverkan samt uppnå balans mellan materialflöde och efterfrågan.

    Resultaten visade att genom att använda ett effektivt materialplaneringssystem, styrs både lagernivå och inköpsorder. Studenten testade även att använda beställningspunktsmetod för att styra lagernivå och inköpsorder.

    Ladda ner fulltext (pdf)
    fulltext
  • 33.
    Ahvenlahti, Nelli
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Multi-functional self-defence device: A study on the desired functions and the construction of a device capable of providing several means of self-defence2021Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The study focuses on creating a self-defence device offering different types of protection possibilities in one device that is also legal in the EU, more specifically in Sweden. 

    I research how much force a device would have to endure in case it is used for defending oneself in an attack, where should it be placed, what type of functions are legal to be used, what materials it needs to be made of and which functions customers would wish to have in a self-defence device.

    The methods used to develop the product are a Gantt-matrix, a customer survey, a PDS, a benchmarking matrix, sketching and the Magic Thing-method for concept generation, interviews with experts, a function analysis tree, a Pugh’s Matrix, CAD-prototyping, FEM simulations and an FMEA analysis.

    The resulting product comprises of a forearm length protective sleeve with an audio emitting device that is placed on top of the hand. The sleeve is made of steel mesh and polyester, protecting the user from knives and other slicing weapons. On the upper side of the forearm the sleeve has an optional panel made of Kevlar. The audio emitting devices has a built-in trigger on the side of the user’s palm, triggering the built-in audio track from the device immediately when the user makes a fist or otherwise presses the trigger. The sound emitted has a volume of 97dB and is comprised of panic stricken high pitched human screams with the intention of both confusing the attacker and to alert nearby people to help. 

    The functions of the device are greatly narrowed down due to law, and other legal self-defence functions such as a blinding, non-laser light are not suitable to be emitted from a device this small, but the device can be further developed outside Sweden by adapting it to legislation of countries where more self-defence functions are legal.  

  • 34.
    Ahvenlampi Svensson, Amanda
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Exploring challenges in a verification process - when adapting production processes to new environmental requirements2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The requirements on the products and production processes within the manufacturing industry are continuously increasing according to environmental standards. The new requirements are coming from a growing awareness of what our planet can provide for example by the global challenge of climate change. The industry needs to reduce energy consumption and waste to meet the upcoming requirements.

    One of the processes with high environmental impact in a discrete manufacturing industry is the paint shop. Surface treatment is also of great importance to maintain a high quality product. In scientific literature, technological risk is one of the barriers in implementing environmental conscious manufacturing. Therefore the area of sustainable operations management needs building bridges with other functions and disciplines such as economics, strategies and behavioral sciences in order to manage the transitions. The supply of competence around paint shops today is usually provided by suppliers and other sources within the industry and to make the collaboration to work is essential. In this process of collaboration with external sources, substantial measurements are required to maintain the desirable quality. In order to ensure the competence of testing the quality eventuate when switching technology at a pre-treatment line, this report sets out to explore what the challenges to be taken into consideration are when to assure the product- and- process quality. To respond to this question, a multiple case study is conducted during spring 2016 where the phenomenon to study is the change process and the unit of analysis is the challenges that can be faced during the verification process. The case studied is automotive companies located in Sweden which are producing components for heavy duty vehicles. Data collection is performed by studying documents, participatory observations and semi-structured interviews. The results will give insights to academia on what challenges that are occurring during the verification process of implementing new and cleaner technologies. The conclusions are drawn upon the literature and the empirical results. The managerial implications are to increase the awareness of any potential barriers in the verification process in order to be prepared for managing the technological change process.

    Ladda ner fulltext (pdf)
    fulltext
  • 35.
    Akbari, Keramatollah
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Impact of Radon Ventilation on Indoor Air Quality and Building Energy saving2009Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Industrial living is caused much people do live and work in closed and confined places; offices and residential buildings. This is why in this new world more fresh air which is generally provided by forced ventilation plays a vital role in living of human being. Furthermore because of many different indoor pollutants, like radon and artificial pollutants, the amount of fresh air and in turn the energy consumption has increased. This energy consumption related to ventilation has reached up to about 30 percent of energy used of building section. So making interaction between indoor air quality (IAQ) and optimization of energy saving is a necessary work.  Radon as a natural pollutant is occurred in environment and in many countries threatens people health whereas is called the second causes of cancer. For reducing radon concentration in residential building at the acceptable level forced ventilation is used usually. Ventilation can improve IAQ but in the other side would increase the energy consumption in building sector and just now the contribution of ventilation exceeds up 50 percent of building sector's share. The aim of this thesis is to study the impact of ventilation on indoor radon by using Computational Fluid Dynamics (CFD) to achieve indoor air quality and energy efficiency. Application of CFD as a new technology, because of its cost and time savings, and on the other side, of its flexibility and precision is  increasingly grown and can be used as a very important and valuable tool for the prediction and measurement of radon distribution in a ventilated building . Currently, measurement techniques and proposed standards and regulations of indoor pollutants and ventilation, particularly related to indoor radon cannot be able to provide a secure, safe and energy efficient indoor climate. This is why the indoor airflow distribution is very complex and with changing building geometry and operation condition, the treatment of air flow pattern, substantially would be changed, whereas the rules are usually independent of the buildings features. Furthermore, the indoor standards and regulations are based on average amount of pollutants in a room, whereas the pollutant distributions aren't identical and are varied throughout the room. Then the current techniques aren't so exactly valuable and acceptable.

    From different methods which is privilege to control pollutants, ventilation method is applicable in existing buildings. Designing effective ventilation can reduce radon concentration to very level low with regarding energy conservation remarks.

     

    This thesis presents results from simulation studies on ventilation and radon mitigation in residential buildings, in view points of indoor air quality and energy savings. The CFD technique is applied to predict, visualize and calculate of mixture radon-air flow. The distribution of indoor radon concentration, air velocity and room temperature also have considered together for achieving indoor air quality and energy saving. The results are also compared with the experimental data and related previous works.

     

    It was found that with increasing ventilation rate, the radon concentration is decreased, but the location of ventilation system is also important. From the simulation results, it is observed that within the ventilated room, there are some zones, which are good for living and somewhere is more polluted. The traditional radon detectors basically show the average value of radon content in 1m­3 of air. That is why detector measuring is not exact and safe.

     

    Simulation results proved that floor heat can be supported ventilation effect and speed up the mixture movement. Floor heating reinforces the buoyancy effect, which is useful to reduce radon content in the floor (seating area) and then lower ventilation rate can be applied.

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 36.
    Akbari, Keramatollah
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Simulation of Indoor Radon and Energy Recovery Ventilation Systems in Residential Buildings2015Doktorsavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    This study aims to investigate the effects of ventilation rate, indoor air temperature, humidity and using a heat recovery ventilation system on indoor radon concentration and distribution.

    Methods employed include energy dynamic and computational fluid dynamics simulation, experimental measurement and analytical investigations. Experimental investigations primarily utilize a continuous radon meter and a detached house equipped with a recovery heat exchanger unit.

    The results of the dynamic simulation show that the heat recovery unit is cost-effective for the cold Swedish climate and an energy saving of about 30 kWh per  floor area per year is possible, while it can be also used to lower radon level.

    The numerical results showed that ventilation rate and ventilation location have significant impacts on both radon content and distribution, whereas indoor air temperature only has a small effect on radon level and distribution and humidity has no impact on radon level but has a small impact on its distribution.

    Ladda ner fulltext (pdf)
    fulltext
  • 37.
    Akel Hasan, A.
    et al.
    Mechanical & Mechatronics Engineering Department, Birzeit University, Palestine.
    Juaidi, A.
    Mechanical & Mechatronics Engineering Department, Faculty of Engineering & Information Technology, An-Najah National University, Nablus, Palestine.
    Abdallah, R.
    Mechanical & Mechatronics Engineering Department, Faculty of Engineering & Information Technology, An-Najah National University, Nablus, Palestine.
    Salameh, T.
    Department of Sustainable and Renewable Energy Engineering, University of Sharjah, Sharjah, United Arab Emirates.
    Ayadi, O.
    Mechanical Engineering Department, The University of Jordan, Amman, Jordan.
    Jaradat, M.
    Energy Engineering Department, German Jordanian University, Amman, Jordan.
    Emad Hammad, R.
    Environmental and Renewable Energy Engineering, German Jordanian University, Jordan.
    Campana, Pietro Elia
    Mälardalens universitet, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Afif Aqel, O.
    Department of Mechanical Engineering and Aeronautics, City, University of London, Northampton Square, London, United Kingdom.
    A review of solar thermal cooling technologies in selected Middle East and North African countries2022Ingår i: Sustainable Energy Technologies and Assessments, ISSN 2213-1388, E-ISSN 2213-1396, Vol. 54, artikel-id 102871Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Cooling loads are a substantial part of the total electricity demands of countries in the Middle East and North Africa (MENA). Fortunately, because of its warm and sunny climate, the MENA region is naturally suited to solar cooling technologies. This article summarizes the most recent research and developments in solar thermal cooling technologies. The working principles and a general literature survey of solar thermal cooling technologies including absorption, adsorption, and desiccant is presented. This is followed by a summary of the literature specific to the MENA region, along with a survey of the prototypes and commercial installation of solar cooling across the MENA region. Based on this review, pilot solar cooling projects in the region are around 1180 kWc, which are split between space conditioning and industrial refrigeration applications. Most of the pilot projects are of absorption cooling type using an ammonia–water binary cycle and parabolic trough solar collectors. However, a few adsorption cooling systems are employed with a water–silica working pair and flat plate collectors. Finally, desiccant cooling systems are still in their infancy, as research and experimental systems in educational institutes.

  • 38.
    Akhonen, Aldo
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Haile, Alexander
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Produktutveckling av verktyg för brunnslocksöppning2023Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Följande examensrapport är resultatet av ett examensarbete på grund c-nivå på högskoleingenjörsprogrammet innovation och produktdesign vid Mälardalens universitet för Eskilstuna kommun. Examensarbetet handlar om en produktutvecklingsprocess för att ta fram en brunnslockslösning avsedd att förbättra tillvägagångsmetoden för att lyfta rännstensbrunnslock. Läsaren av denna rapport får ta del av hur vetenskapliga produktutvecklingsmetoder användes för att utveckla en slutlig brunnslocksverktygsprototyp och vilka moment som processerna innefattade.

    Programvaran SolidWorks användes för att konstruera CAD-modeller som grundade olika testkonstruktioner och den slutliga prototypen.

    Examensrapportens resultat består av ett slutligt brunnslocksverktyg som kunde tillämpas för att öppna fjädrande rännstensbrunnslock.

    Ladda ner fulltext (pdf)
    Produktutveckling av verktyg för brunnslocksöppning
  • 39.
    Akter, Salina
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Islam, M. Sirajul
    Örebro Univ, Sch Business, Örebro.
    Factors influencing the attitude of women towards purchasing green products: An explorative case study of organic cosmetics in sweden2020Ingår i: JOURNAL OF CONSUMER SCIENCES, ISSN 0378-5254, Vol. 48, s. 38-64Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper investigates green consumer behavior by analyzing women's attitudes towards purchasing organic cosmetics in Sweden in order to determine the factors that influence their purchasing behavior. The study is based on the modified Theory of Planned Behavior (TPB) explained with primary data collected through an online survey of 220 women who live in Sweden. The findings are in line with the previous studies, which confirm that consumers' attitudes towards green products have a positive influence on purchase intention. Moreover, this study has found that the individual's education and income level have a positive relationship with attitude and future purchase intention.

  • 40.
    Al, Goran
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Boge, Kasper
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Metod för att säkra innehållet i Scania lastbilars underhållsprogram: Tillämpning av MSG-3 processen från flygindustrin2012Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Ladda ner fulltext (pdf)
    Rapport - Scania
  • 41.
    Al Hakim, Hoda
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Al-Delemi, Rend
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Identifiering av slöserier i materialflödet för montering2020Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Introduction: The introduction aims to provide a background to the problem in manufacturing companies in terms of logistics and material handling. It provides a brief description of the key areas of this study.

    Purpose and research question: The purpose of the study is to investigate the internal material supply flow in a manual assembly line. This is accomplished by identifying potential Lean concepts in the material flow for reduced waste and more efficient work. Based on the purpose of the study, two issues were formulated to solve these problems:

    RQ1: What wastes are present in the material supply flow?

    RQ2: How can wastes be reduced to increase the efficiency of the material supply flow?

    Approach and method: A case study was conducted at a producing company and data was collected through literature review, observations and semi- and unstructured interviews. The literature review was collected in order to link the theoretical frame of reference with the result and was obtained from scientific articles and books.

    Results: A few wastes were identified at the case company, and these were waiting, unnecessary and impractical movements, as well as unused skills. There is no good material handling system at the company that contributes to the cause of some of these wastes. This creates an inefficient flow of material which in turn creates delays.

    Conclusion: The conclusions that can be drawn in this study are that wastes occur on the case company's assembly line, which creates an inefficient material supply flow. Some Lean tools and concepts were introduced to be able to reduce these wastes and give the case company the opportunity to implement these to achieve an efficient material supply flow. An improvement layout was also developed to reduce waste.

    Keywords: Logistics, Material supply, Lean, Wastes, Material flow

    Ladda ner fulltext (pdf)
    Identifiering av slöserier i materialflödet för montering
  • 42.
    Al Hamrani, Emad
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Al-Dulaimi, Anmar
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Framtida installationskrav på Electronic Flight Bags (EFB): Med hänsyn till litiumbatterier2017Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta examensarbete studerar de framtida installationskrav för Electronic Flight Bag (EFB) med fokus på hårdvaran och dess påverkan på säkerheten. Rapporten kan användas som manual som tydliggör vilka procedurer och rekommendationer operatören kan ta hänsyn till vid installation och användning av EFB. I flygbranschen har de flesta flygbolag redan börjat använda surfplattor istället för dokument och manualer. EFB är ett elektroniskdisplaysystem som i första hand används i flygplanets cockpit. EFB:s funktion är att förse piloten med en mängd olika data om flygplanet t.ex. prestanda, balans och vikt beräkningar, bränsle mm. Displayen är en ersättning av det traditionella ”Flight Bag” som för i tiden var i pappersform och innehöll alla kartor och manualer skriftligt. Som alla andra teknologier har EFB sina begränsningar såsom batteriproblem, påverkan på säkerheten och ”Flight Controls” i flygplanets cockpit. Genom studier och sammanfattning av skillnaden mellan nuvarande och framtida regelverk har man kommit fram till att inga märkbara förändringar har skett. Fältstudien var till nytta för att analysera vilka säkerhetsproblem varje installationstyp har. Utrustningar som smart induktiv laddare och smart brandskyddsväska har fåtts som resultat i arbetet. Dessa utrustningar är till att motverka faror som är möjliga att ske under användning av EFB i cockpit.

    Ladda ner fulltext (pdf)
    Framtida installationskrav på EFB
  • 43.
    Al Hamrani, Emad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Gibrael, Nemir
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Fast determination of fuel/feedstock material properties and composition: By Near infrared (NIR) spectroscopy2016Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Ladda ner fulltext (pdf)
    Fast determination of fuel/feedstock material properties and composition
  • 44.
    Alamerison, Seif
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Tarek, Karzan
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Samverkanspelare i icke bärande fasadelement2009Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats
    Abstract [en]

    Abstract

    The tests work is about the subject "synergism of steel and concrete."

    The construction sector is in a strong competition and the different companies in the Prefab

    Market has ever tried to develop new design solutions that are efficient and environmentallyfriendly.

    The purpose of this report is to highlight different aspects of interaction and size up a columndimension and to examine its efficiency and load capacity as Eurocode 3 and Eurocode 4. A sizing chart that describes the relationship between the torque and normal force shouldalso be made of the interaction .

     

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 45.
    Alayon, Claudia
    et al.
    Högskolan i Jönköping, Sweden.
    Sannö, Anna
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Säfsten, Kristina
    Högskolan i Jönköping, Sweden.
    Johansson, Glenn
    Mälardalens högskola, Akademin för innovation, design och teknik, Innovation och produktrealisering. Högskolan i Jönköping, Sweden.
    Sustainable production adoption by Surface Treatment SMES: challenges and enablers2015Ingår i: Global Cleaner Production & Sustainable Consumption Conference 2015 GCPC2015, 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    The adoption to sustainable production is a continuous but necessary strive for manufacturing operations, including small and medium enterprises, SMEs. Meeting the future needs of the economic, social and environmental dimensions provides challenges for SMEs. In order to meet these challenges, understanding of internal and external enablers is required. Studies focusing on the enablers for sustainability among SMEs are rare; hence these companies are important players in the supply chain to focal companies. In order to enhance the understanding of the adoption of sustainable production for the sector surface treatment SMEs, an exploratory study has been conducted. In this study, the focus has been placed in the identification and analysis of the challenges and enablers for adoption of sustainable production. Two stages of empirical data collection were undertaken: a focus group session and an online questionnaire. The findings present challenges based on the limitations of the surface treatment process but also where enablers for the social, economic and environmental for meeting those challenges are interrelated. The results showed that these SMEs face challenges in their way towards sustainable production, mainly due to: low economic profitability, need for improvement in old working procedures, lack of fully understanding regarding environmental legislation, difficulty in ensuring workforce, lack of technology development and resistance towards change. These challenges could be faced through internal and external enablers, where the support of large-size customers and other stakeholders is critical for this sector.

  • 46.
    Alayón, C. L.
    et al.
    Department of Industrial Product Development, Production and Design, School of Engineering, Jönköping University, Jönköping, 551 11, Sweden.
    Säfsten, K.
    Department of Industrial Product Development, Production and Design, School of Engineering, Jönköping University, Jönköping, 551 11, Sweden.
    Johansson, Glenn
    Mälardalens universitet, Akademin för innovation, design och teknik, Innovation och produktrealisering.
    Barriers and Enablers for the Adoption of Sustainable Manufacturing by Manufacturing SMEs2022Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 14, nr 4, artikel-id 2364Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Small-and medium-sized enterprises (SMEs) have inherent characteristics, which require specific solutions for improving the sustainability performance of their operations. The purpose of this paper is to increase the knowledge on barriers and enablers for the adoption of sustainable manufacturing by manufacturing SMEs and to provide insights into what enablers can be used to overcome existing barriers. Taking, as a starting point, a systematic literature review, this paper presents a categorization of barriers and enablers for the adoption of sustainable manufacturing by manufacturing SMEs. In total, seven categories for classifying the barriers and enablers for the adoption of sustainable manufacturing within SMEs were identified: organizational, managerial and attitudinal; informational; governmental; financial; training and skills development; market and business context; and technological. Additionally, this study elaborates on what barriers could be mitigated through the enablers. This study found specific enablers with the potential to mitigate a significantly higher number of barriers and referred to them as ‘critical enablers’. SMEs aiming to adopt sustainable manufacturing practices or improve their sustainability performance are encouraged to focus on the enablers in these categories. This paper synthesizes and facilitates interpretation of the existing body of evidence on barriers and enablers for adopting sustainable manufacturing in SMEs. 

  • 47.
    Al-Delemi, Rend
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Al Hakim, Hoda
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Utveckling av en fixtur genom Open Innovation2021Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Introduktion: Introduktionen syftar till att ge en bakgrund till fallföretaget, vad Open Innovation (OI) är och hur konceptet används i producerande företag som är stora och SME, samt en kort beskrivning av hur en fixtur kan se ut.

    Syfte och frågeställningar: Syftet och målet med denna studie är att utveckla en permanent fixtur till fräsmaskiner som ska skära olika artiklar i olika längder för att spara tid och pengar. Eftersom fallföretaget använder denna studie som en OI-strategi är syftet även att undersöka varför producerande företag använder OI vid utvecklingsarbeten och vilka risker det kan medföra. Utifrån studiens syfte formulerades två frågeställningar:

    FF1: Vilka är de främsta orsakerna till att producerande företag använder OI i deras produktutvecklingsprocess och vilka risker kan förekomma genom användning av OI?

    FF2: Kan en generisk produktutvecklingsprocess om möjligt tillämpas vid framtagning av en fixtur till fräsmaskinergenom OI? Vilka steg är i sådana fall tillämpbara i denna studie?

    Ansats och metod: En fallstudie utfördes på ett företag och data samlades in genom litteraturstudier, observationer, samt semi-och ostrukturerade intervjuer. Litteraturstudien samlades in för att kunna koppla den insamlade teoretiska data med resultatet, och hämtades från böcker och vetenskapliga artiklar. Produktutvecklingsprocessen utfördes genom att följa den teoretiska referensramen.

    Resultat: Respondenterna använder OI för extern input för att utveckla tekniken och utnyttja extern kunskap. Konceptet används för att få innovationsprocessen att fortskrida. Respondenterna har upplevt positiva resultat av att använda OI, men det har även medfört vissa risker. Studenter används ofta som en OI-strategi för att utföra studentarbeten och projekt hos företag. En fixtur utvecklades genom att följa en generisk produktutvecklingsprocess och en 3D CAD-modell av produktlösningen utvecklades. Faserna produktplanering, konceptutveckling, utveckling på systemnivå och detaljutveckling fullföljdes för att ta fram en lösning till problemet som fallföretaget upplevde.

    Slutsatser: Slutsatserna som kan dras i denna studie äratt OI rekommenderas att användas i producerandeföretag för att fortsätta utvecklas även fast det kan medföra risker. En fixtur skapades utifrån de krav-och målspecifikationerna som fallföretaget hade, med en lösning till problemet som fanns. Fixturen som utvecklades kan tillverkas ekonomiskt och praktiskt och kan bespara fallföretaget tid och pengar.

    Ladda ner fulltext (pdf)
    fulltext
  • 48.
    Alderman, N.
    et al.
    Newcastle University, UK.
    Ivory, Chris
    Newcastle University, UK.
    Service‐led projects: understanding the meta‐project context2010Ingår i: Construction Management and Economics, ISSN 0144-6193, E-ISSN 1466-433X, Vol. 28, nr 11, s. 1131-1143Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The service‐led project is driven by the demand for long‐term service provision based on the output of a conventional capital good. The project management implications of the extended timeframe for such projects are considered and the added risks and uncertainties associated with planning for an unknown future business environment. Detailed case studies of three service‐led engineering projects in the context of port facilities, high‐speed trains and sludge treatment are examined. The findings indicate that service‐led projects exist within the context of a meta‐project that encompasses a consideration of critical activities beyond the normal remit of the project manager. Aligning project stakeholders around a vision for the meta‐project becomes a key task in the successful management of the service‐led project.

  • 49.
    Alexander, Dujlo
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Effektivisering av materialhantering vid montering av gruvpumpar: Med en optimerad layout2020Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Syfte och frågeställningar: Syftet med examensarbetet är att analysera materialflödet vid montage av gruvpumpar och identifiera de slöserier som förekommer i den. Det som även ska presenteras är en mer optimal layout som ska reducera de slöserier som finns idag och skapa ett mer effektivt materialflöde. Utifrån studiens syfte skapades och besvarades tre föregeställningar:

     

    (1)   Vilka slöserier förekommer i den interna materialhanteringen vid montage?

     

    (2)   Hur kan materialhanteringen effektiviseras vid montage?

     

    (3)   Hur kan montagelayouten optimeras?

     

    Metod och genomförande: En fallstudie har utförts på globalt företag inom gruvindustrin som tillverkar kundspecifika pumpar. Data samlades in genom tidsstudie, observationer, semi- och ostrukturerade intervjuer och genom det interna systemet. En litteraturstudie genomfördes föra att kunna koppla teorin med empirin. Teorin inhämtades från böcker och vetenskapliga artiklar.  

     

    Resultat: Efter analys av materialflödet på fallföretaget kunde flera slöserier identifieras i form av väntan, lager, onödiga transporter, outnyttjad kompetens och defekta produkter. Det saknas ett tydligt kommunikationssystem mellan planering, lager och montage vilket är en anledning till de slöserier som skapats. En annan anledning är att det saknas samband mellan de olika stationerna av montage vilket skapar ett ineffektivt materialflöde på grund av dagens layout. 

     

    Slutsatser: De slutsatser som kan dras av denna studie är att en ej optimal layout i kombination med ett saknat system mellan berörda avdelningar för montage skapar ett ineffektivt materialflöde. Vissa lean-verktyg, de 10 principer för en effektiv materialhantering och de riktlinjer för framtagning av en optimal layout skapar ett mer effektivt materialflöde.     

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  • 50.
    Alfredsson, Ammar
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Utvärdering av förebyggande underhållsstrategi för elektriska flygplan2023Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis focuses on the topic of preventive maintenance for electric aircraft and aims to examine its significance and implementation within the aviation industry. Electric aircraft have become increasingly popular as a sustainable alternative to conventional aircraft, making it crucial to develop effective maintenance strategies to ensure their reliability and performance.

    To achieve this objective, a comprehensive literature review of existing research and practices in the field of preventive maintenance for electric aircraft is conducted. The study identifies the key components and systems in an electric aircraft that require regular monitoring and maintenance, such as electric motors, batteries, power converters, and control systems.

    By analyzing the benefits of preventive maintenance, such as reduced downtime, increased component lifespan, and decreased maintenance costs, various methods, and techniques for implementing preventive maintenance for electric aircraft are presented. This includes the use of condition monitoring systems, sensors, and data-driven analysis to monitor and predict the health of components and anticipate any faults or deviations in advance.

    To explore the challenges of preventive maintenance for electric aircraft, aspects such as data management, cooling, and electromagnetic compatibility are also discussed. Furthermore, the need for training and skill development for maintenance personnel to effectively carry out preventive maintenance activities for electric aircraft is explored.

    By compiling and analyzing the available information, this thesis provides a comprehensive overview of preventive maintenance for electric aircraft and its significance in ensuring reliability, performance, and sustainability within the aviation industry. The findings can be valuable to airlines, maintenance organizations, and researchers interested in implementing effective maintenance strategies for electric aircraft and contributing to the continued development of sustainable aviation.

    The literature review showed that the use of preventive maintenance strategy for electric aircraft is well-founded and supported by research and experiences from various industries. The implementation of IoT and fault diagnostic techniques can enhance the maintenance process and increase the reliability of electric aircraft by identifying and addressing potential faults at an early stage. These findings provide valuable insights and guidelines for the aviation industry in developing and optimizing their maintenance strategies for electric aircraft.

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