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  • 1.
    Mattsson, S.
    et al.
    Chalmers University of Technology, Göteborg, Sweden.
    Tarrar, M.
    Chalmers University of Technology, Göteborg, Sweden.
    Svensson Harari, Natalia
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Using the compleXity index for improvement work: Investigating utilisation in an automotive company2020In: International Journal of Manufacturing Research, ISSN 1750-0591, Vol. 15, no 1, p. 3-21Article in journal (Refereed)
    Abstract [en]

    CompleXity index (CXI) is a method that measures perceived production complexity. CXI was applied in the assembly and material-handling department at a manufacturer in the automotive industry, followed by workshops. The aim of the article was, based on the results, to investigate if CXI could be used to capture and transmit a current situation and be used by the operators and managers for improvement work. A high CXI level was measured for most of the production areas. The areas were mainly perceived as complex due to work variance and station design. The workshops revealed that the operators felt identified with the results and thought the method could be used to discuss their situation in detail.

  • 2.
    Osterman, Christer
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation. Scania CV AB, Sweden.
    Svensson Harari, Natalia
    Volvo Construction Equipment, Eskilstuna, Sweden.
    Lundin, Anders
    Volvo Construction Equipment, Eskilstuna, Sweden.
    Examination of the flexibility paradox in a Lean system2014In: , 2014Conference paper (Refereed)
    Abstract [en]

    This paper explores if Lean is to be considered flexible or not. A multiple case study in the automotive industry is conducted to find the dependencies between Lean and flexibility. Since many definitions of flexibility and Lean exists, a pragmatic approach is sought where each cases own definition of Lean is used to analyze if the factors that enable flexibility are to be considered Lean or not. The context of this paper is volume and product flexibility.

    Lean and flexibility are found to be independent of each other in a direct sense. However, indirectly it is found that flexibility in a Lean context is achieved through decisions made when finding solution during problem solving. Also, the level of flexibility can also be seen as a decision. Therefore Lean in itself cannot be regarded as either flexible nor inflexible but flexibility can be achieved when choosing solutions to particular problems.

    Download full text (pdf)
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  • 3.
    Schedin, Joel
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Svensson Harari, Natalia
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Jackson, Mats
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Deleryd, Mats
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Management of newness in an assembly system2016In: Journal of Machine Engineering, ISSN 1895-7595, Vol. 16, no 1, p. 92-108Article in journal (Refereed)
    Abstract [en]

    The need for new products to suit differentiated customer needs and shorter product life-cycles, forces manufacturers to change or modify products and production systems at more frequent intervals. The objective of this paper is to discuss management of newness within assembly system design in the vehicle industry. Based on a case study covering four assembly development projects, a model using the quality concept of “7M” is presented to evaluate the level of newness. The results show that the model provides a promising platform for evaluation of newness. 

  • 4.
    Svensson Harari, Natalia
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Design Process of Flexible Assembly Systems2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Flexible assembly systems have emerged in response to changing markets and increased variety in form of demands of new products and manufacturer’s need for differentiation. Assembly systems play a critical role in handling great variety and adapting to dynamic changes at the same time as securing product quality and productivity. Therefore, assembly systems should be designed to be able to handle changes. However, the design of flexible assembly systems is a challenge because it involves several subjects such as the configuration of the flow, the material handling and the flexibility to handle future changes and adjustment. In addition, time-to-market and time-to-volume are important which means that faster assembly systems designs are required.

    The design process of assembly systems concerns the procedures that guide the design work to achieve an assembly system proposal. The design process is divided into a number of stages/phases describing the activities that should be done and when they should be performed as well as the expected result after each phase supporting the decision-making process. Research argues that working in a systematic and structured way is important in order to achieve better assembly systems in shorter time.

    However, even though there is extensive research work in regard to flexibility, knowledge is limited concerning the design process of assembly systems. Therefore, the objective of this thesis has been to increase the knowledge about the design of flexible assembly systems by investigating the relation between the assembly system design process and flexibility. The characteristics of flexible assembly systems and how flexibility is considered during the design process have also been studied in this thesis.

    Literature reviews were conducted as well as three case studies and one exploratory survey in the manufacturing industry of heavy vehicles. Study I concerns the results of having studied an industrial international project of the design process of a flexible assembly system during two years. In study II, flexibility needs, enablers and challenges in assembly systems were identified. In study III, the mechanism used to achieve flexibility in the assembly systems of two companies were investigated. The exploratory survey study IV, was a pilot study to investigate the relationship between the design process of assembly systems and flexibility based on the association of different variables involved in the design process of flexible assembly systems.

    From the holistic perspective adopted in this thesis, the results showed that flexibility should be considered in a comprehensive way during all the design process. The design process of flexible assembly systems is iterative, circumscribed by different conditions, and requires support as well as the participation of different roles and functions to achieve a solution. The increased knowledge generated in the research is expected to lead to future development of working procedures that better can support the design process of flexible assembly systems.

    Download full text (pdf)
    fulltext
  • 5.
    Svensson Harari, Natalia
    et al.
    Mälardalen University, School of Innovation, Design and Engineering.
    Bruch, Jessica
    Mälardalen University, School of Innovation, Design and Engineering.
    Jackson, Mats
    Mälardalen University, School of Innovation, Design and Engineering.
    Flexibility Needs and Enablers in Assembly Systems2013Conference paper (Refereed)
    Abstract [en]

    The purpose of the research presented in this paper has been to analyze flexibility needs and enablers in assembly systems. The methodology used for the research has been a literature review and a case study at a Swedish manufacturing company. Flexibility as a competitive factor has been shown to be needed in order to satisfy the changing demands, at low cost and with delivery precision. The level of customization and changes in volume also increases the flexibility needs. The results from the case study indicate that there are four flexibility enablers in assembly systems: capacity and production planning, production development, material supply, and work organization. The needs of flexibility should be considered during the design process of the assembly system to respond to changes in product variants and production volumes in a cost-effective way.

  • 6.
    Svensson Harari, Natalia
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Bruch, Jessica
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Jackson, Mats
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Mixed-Product Assembly Lines: Characteristics and Design Challenges2014Conference paper (Refereed)
  • 7.
    Svensson Harari, Natalia
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Fundin, Anders
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Carlsson, Anna-Lena
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Components of the Design Process of Flexible and Reconfigurable Assembly Systems2018In: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, no 8, p. 549-556Article in journal (Refereed)
    Abstract [en]

    Assembly systems need to manage changes in products and volume. During the design process, preconditions for the operation of assembly systems are generated. The purpose of this paper is to identify the components of the design process of flexible and reconfigurable assembly systems. Literature reviews were conducted and empirical data from six research studies were analyzed to report the results. The authors suggest that the findings can give a clearer overview of the components in these design processes and support studies about relations between components as well as practitioners with a holistic view during the design work.

  • 8.
    Svensson Harari, Natalia
    et al.
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Osterman, Christer
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Bruch, Jessica
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Jackson, Mats
    Mälardalen University, School of Innovation, Design and Engineering, Innovation and Product Realisation.
    Flexibility in Lean Mixed Model Assembly Lines2014In: IFIP Advances in Information and Communication Technology, Vol. 440, 2014, no PART 3, p. 224-231Conference paper (Refereed)
    Abstract [en]

    The purpose of the research presented in this paper has been to characterize flexibility in lean mixed model assembly lines through exploring mechanisms used to achieve flexibility. The study combines a literature review and a multiple case study in two manufacturing companies. Scenarios of volume, mix and operation flexibility, as well as flexibility to introduce or remove products were studied. The results showed that to achieve flexibility related to these scenarios other kinds of flexibilities were used. Common mechanisms to achieve flexibility have been found in the two cases. A characterization of mixed model assembly lines regarding flexibility will be discussed. 

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