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  • 1.
    Lindgren, Markus
    Uppsala University.
    Measurement and Simulation Based Techniques for Real-Time Systems Analysis2000Licentiate thesis, comprehensive summary (Other scientific)
    Abstract [en]

    Rigorous methods for design and implementation of safety critical real-time systems are vital to avoid loss of human lives and/or severe economic losses.  Unfortunately, many of these systems are designed and evaluated using ad-hoc techniques. There are, on the other hand, relatively well developed theories for modeling and analysis of timing and reliability. These theories are, however, seldom applied in industry for system development, mainly because of the simplifying model assumptions and lack of appropriate tool support.This thesis presents two new methods aimed to narrow the gap between research results and industrial practice in evaluation and design of real-time systems.The first contribution is a technique that can be used to derive worst-case execution time estimates for real-time software by measurments on the target system. Such estimates are essential when verifying if a system fulfills its timing requirements. The second contribution is a simulation based technique that can be used to evaluate timing aspects of distributed real-time systems, as well as calculating reliability estimates of these systems. Such estimates are essential in determining if a system meets its requirements sufficiently well. Compared to existing analytical methods for execution time analysis and schedulability analysis, which analyze models of the hardware, the starting point for both these methods are real target systems, rather than an abstract model with limited correspondance to reality.The presented initial case-studies give clear evidence that the proposed methods have potential of being both applicable and useful.

  • 2.
    Lindgren, Markus
    Mälardalen University, Department of Computer Science and Electronics.
    Release Planning in Industry - Interview Data2007Report (Other academic)
    Abstract [en]

    Release planning can be seen as company-wide optimization problem involving many stakeholders where the goal is to maximize utilization of the often limited resources of a company and turn them into business benefit. The release planning results in a decision of

    what to include in future release(s) of a product. In making this decision

    one needs to consider how to make a product profitable both in the short- and long-term. As input to release planning are a set of {em needs} that, when realized into a product, provides some business/customer value. Normally the cost of implementing all of the proposed needs is larger than the budget allocated to a release, therefore a decision needs to be made of what to include in a release and what to post-pone. Thus, the set of needs needs to be prioritized in order to maximize business value of the needs included in a release.

    This report documents interview data resulting from multiple case study investigating how release planning is performed in industry today. In a sense it captures state-of-the-practice for release planning.

  • 3.
    Lindgren, Markus
    Mälardalen University, School of Innovation, Design and Engineering.
    Towards a Capability Model for Release Planning of Software Intensive Systems2008Doctoral thesis, comprehensive summary (Other scientific)
    Abstract [en]

    Release planning is an early product development activity concerned with deciding which features and quality improvements that should be pursued in product development projects, i.e., it is an activity which in large parts decide how the development budget of a company is allocated.

    This thesis investigates release planning for long-lived software intensivesystems; systems which contain software, electronics, and mechanics, and which have a life-cycle of 10-20 years. In performing release planning for these kind of systems, the existing system, including its architecture, often represent a large investment which has impact on which features and quality improvements that are cost-efficient to include in a future release. However, in industry today, little attention is given to the existing system during planning, resulting in decisions being based on uncertain information, and thereby increasing the risk of problems in the development projects.

    This thesis is based on a multiple case study involving seven industrialcompanies developing and producing long-lived software intensive systems. There are several contributions in this thesis, aimed at understanding and improving the release planning process: (1) validation of previous research related to key-aspects for release planning including identification of short- and long-term planning as a new key-aspect; (2) the capture of state-of-the-practice for release planning in industry; (3) a proposal for a capability model for release planning, which can be used to assess the capabilities of a company's release planning process, but also for identifying process improvement possibilities; and (4) a process for how to decide the balance between investments in features and quality improvements, developed based on the practices used at two of the most capable companies in the study. Finding such a balance is important since adding new features may attract new potential customers, while improving the quality for existing customers can reduce costs of poor quality.

     

  • 4.
    Lindgren, Markus
    et al.
    ABB Force Measurement.
    Land, Rikard
    Mälardalen University, School of Innovation, Design and Engineering.
    Norström, Christer
    Mälardalen University, School of Innovation, Design and Engineering.
    Wall, Anders
    ABB Corporate Research.
    Key Aspects of Software Release Planning in Industry2008In: Proceedings of the Australian Software Engineering Conference, ASWEC, IEEE Computer Society , 2008, p. 320-329Conference paper (Refereed)
    Abstract [en]

    Software release planning is the process of deciding what to include in future release(s) of a product. Basically the problem can be seen as a company-wide optimization problem involving many stakeholders where the goal is to maximize utilization of the often limited resources of a company and turn them into business benefit. Saliu and Ruhe have proposed a set of key aspects for release planning methods, of which only a subset have been validated in industry. In this paper we use the Saliu and Ruhe key aspects as a starting point for identifying key aspects of release planning. To do this we have performed a multiple case study involving 7 international industrial companies, all producers of software intensive products. Our contribution is (1) a more strict meaning of a release planning key aspect, (2) validation of some of the aspects proposed by Saliu and Ruhe, and (3) an extension of the key aspects. We also capture state-of-the-practice for release planning in industry.

  • 5.
    Lindgren, Markus
    et al.
    ABB Force Measurement, Sweden.
    Land, Rikard
    Mälardalen University, School of Innovation, Design and Engineering.
    Norström, Christer
    Mälardalen University, School of Innovation, Design and Engineering.
    Wall, Anders
    ABB Corporate Research, Sweden.
    Towards a Capability Model for the Software Release Planning Process — Based on a Multiple Industrial Case Study2008In: In Proc. 9th International Conference on Product Focused Software Process Improvement, Berlin / Heidelberg: Springer , 2008, p. 117-132Conference paper (Refereed)
    Abstract [en]

    Software release planning is an important activity for effectively identifying the customer needs generating best business, especially for incremental software development. In this paper we propose a capability model for improving the release planning process of an organization. Using this model it is possible to 1) determine the capabilities of an organization’s release planning process, and 2) identify areas for improvement. The model is based on empirical data from a multiple case study involving 7 industrial companies, all being producers of software intensive systems. We also provide examples of how the proposed capability model can be applied using the companies from the study.

  • 6.
    Lindgren, Markus
    et al.
    ABB Force Measurement.
    Norström, Christer
    Mälardalen University, School of Innovation, Design and Engineering.
    Wall, Anders
    ABB Corporate Research.
    Land, Rikard
    Mälardalen University, School of Innovation, Design and Engineering.
    Importance of Software Architecture during Release Planning2008In: 7th IEEE/IFIP Working Conference on Software Architecture, WICSA 2008, IEEE Computer Society , 2008, p. 253-256Conference paper (Refereed)
    Abstract [en]

    Release planning is the process of deciding what to include in future release(s) of a product. In this paper we look at how software architects are involved during release planning in industry today, and how architectural issues are considered during this phase.

  • 7.
    Lindgren, Markus
    et al.
    ABB Force Measurement.
    Wall, Anders
    ABB Corporate Research.
    Land, Rikard
    Mälardalen University, School of Innovation, Design and Engineering.
    Norström, Christer
    Mälardalen University, School of Innovation, Design and Engineering.
    A Method for Balancing Short- and Long-Term Investments: Quality vs. Features2008In: EUROMICRO 2008 - Proceedings of the 34th EUROMICRO Conference on Software Engineering and Advanced Applications, SEAA 2008, IEEE Computer Society , 2008, p. 175-182Conference paper (Refereed)
    Abstract [en]

    There are a number of conflicting forces between shortand long-term considerations for software release planning in industry. For example, from a business perspective it is usually desired with a short time-to-market. However, from software quality perspective it is usually desired to have a longer time-to-market such that the proper architectural mechanisms can be put in place, which in the long-term reduce development cost and addresses quality aspects. In this paper we outline some of these conflicting forces, with a focus on long-lived systems, and examplify how they impact product quality and time-to-market. In this paper we propose a simple, but useful, extensionof the release planning process that addresses these conflicting forces. The method is inspired from empirical data captured in a multiple case study involving 7 companies.

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