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- Alenljung, Beatrice
(author)
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Envisioning a Future Decision Support System for Requirements Engineering : A Holistic and Human-centred Perspective
- 2008
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Doctoral thesis (other academic/artistic)abstract
- Complex decision-making is a prominent aspect of requirements engineering (RE) and the need for improved decision support for RE decision-makers has been identified by a number of authors in the research literature. The fundamental viewpoint that permeates this thesis is that RE decision-making can be substantially improved by RE decision support systems (REDSS) based on the actual needs of RE decision-makers as well as the actual generic human decision-making activities that take place in the RE decision processes. Thus, a first step toward better decision support in requirements engineering is to understand complex decision situations of decision-makers. In order to gain a holistic view of the decision situation from a decision-maker’s perspective, a decision situation framework has been created. The framework evolved through an analysis of decision support systems literature and decision-making theories. The decision situation of RE decision-makers has been studied at a systems engineering company and is depicted in this thesis. These situations are described in terms of, for example, RE decision matters, RE decision-making activities, and RE decision processes. Factors that affect RE decision-makers are also identified. Each factor consists of problems and difficulties. Based on the empirical findings, a number of desirable characteristics of a visionary REDSS are suggested. Examples of characteristics are to reduce the cognitive load, to support creativity and idea generation, and to support decision communication. One or more guiding principles are proposed for each characteristic and available techniques are described. The purpose of the principles and techniques is to direct further efforts concerning how to find a solution that can fulfil the characteristic. Our contributions are intended to serve as a road map that can direct the efforts of researchers addressing RE decision-making and RE decision support problems. Our intention is to widen the scope and provide new lines of thought about how decision-making in RE can be supported and improved.
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| 2. |
- Carlshamre, Pär
(author)
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A usability perspective on requirements engineering : from methodology to product development
- 2001
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Doctoral thesis (other academic/artistic)abstract
- Usability is one of the most important aspects of software. A multitude of methods and techniques intended to support the development of usable systems has been provided, but the impact on industrial software development has been limited. One of the reasons for this limited success is the gap between traditional academic theory generation and commercial practice. Another reason is the gap between usability engineering and established requirements engineering practice. This thesis is based on empirical research and puts a usability focus on three important aspects of requirements engineering: elicitation, specification and release planning.There are two main themes of investigation. The first is concerned with the development and introduction of a usability-oriented method for elicitation and specification of requirements, with an explicit focus on utilizing the skills of technical communicators. This longitudinal, qualitative study, performed in an industrial setting in the first half of the nineties, provides ample evidence in favor of a closer collaboration between technical communicators and system developers. It also provides support for the benefits of a task-oriented approach to requirements elicitation. The results are also reflected upon in a retrospective paper, and the experiences point in the direction of an increased focus on the specification part, in order to bridge the gap between usability engineering and established requirements management practice.The second represents a usability-oriented approach to understanding and supporting release planning in software product development. Release planning is an increasingly important part of requirements engineering, and it is complicated by intricate dependencies between requirements. A survey performed at five different companies gave an understanding of the nature and frequency of these interdependencies. This knowledge was then turned into the design and implementation of a support tool, with the purpose of provoking a deeper understanding of the release planning task. This was done through a series of cooperative evaluation sessions with release planning experts. The results indicate that, although the tool was considered useful by the experts, the initial understanding of the task was overly simplistic. As a result, a number of design implications are proposed.
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| 3. |
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| 4. |
- Hägglund, Rickard, et al.
(author)
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Measuring thickness changes of edge-wise compression loaded corrugated board panels using digital image correlation
- 2012
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In: Journal of Sandwich Structures and Materials. - : SAGE Publications. - 1099-6362 .- 1530-7972. ; 14:1, s. 75-94
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Journal article (peer-reviewed)abstract
- This study examines thickness changes in web-core sandwich panels under edgewise compressive loading. Both undamaged and damaged panels were examined. Three-dimensional full-field digital image correlation systems were used to determine deflections on both sides of loaded panels. The change in thickness at any given point in the panel was obtained as the difference between the two displacement fields. It was observed that the thickness was reduced in the post-buckling regime. Damage introduced into the corrugated core by lateral compression proved to significantly reduce the load-carrying capability panels and elevate the thickness reduction of the panels.
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| 5. |
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| 6. |
- Riggare, Sara, et al.
(author)
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Patients are doing it for themselves : A survey on disease-specific knowledge acquisition among people with Parkinson's disease in Sweden.
- 2017
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In: Health Informatics Journal. - : SAGE Publications. - 1460-4582 .- 1741-2811.
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Journal article (peer-reviewed)abstract
- Effective self-management is key to living well with Parkinson's disease and one important aspect is disease-specific knowledge. This article explores how people with Parkinson's disease in Sweden (1) acquire disease-specific knowledge and (2) use Parkinson's disease-related healthcare. Data were collected through an online survey, which had 346 respondents (16-87 years old, median age: 68 years, 51% male; time since diagnosis: 0-31 years, median time: 7 years). Our results show that disease-specific knowledge is mainly found online, especially for women with Parkinson's disease and people with Parkinson's disease of working age, that most people with Parkinson's disease in Sweden see their neurologist for 1 h or less per year and only one in two people with Parkinson's disease has regular contact with other Parkinson's disease-related healthcare professionals. We also find that people with Parkinson's disease reporting higher levels of specific knowledge also are more likely to be satisfied with the amount of time they get with their neurologist, regardless of the amount of time.
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| 7. |
- Åslund, Pär, et al.
(author)
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An analysis of strain localization and formation of face wrinkles in edge-wise loaded corrugated sandwich panels using a continuum damage model
- 2015
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In: International Journal of Solids and Structures. - : Elsevier BV. - 0020-7683 .- 1879-2146. ; 56-57, s. 248-257
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Journal article (peer-reviewed)abstract
- This paper examines the compressive failure mechanism in edge-to-edge loaded corrugated sandwich panels. The formation of face wrinkles is specifically considered. A detailed finite element model of face sheets and web core of a sandwich panel was developed to provide insight on the failure mechanism. A gradient enhanced continuum damage theory was implemented to capture length effects caused by the material microstructure including formation of damage in the face sheets and core. Distributions of strains in the face sheets determined from finite element analysis (FEA) are compared to experimentally measured strains. The predicted location and orientation of the face wrinkle, as indicated by high values of the second principal strain, agrees well with experimental observations. Load vs. out-of-plane deflection curves obtained from FEA with the gradient enhanced damage material model are compared to those obtained from a linear-elastic material model and experimentally determined curves. The gradient enhanced solution gives qualitatively better agreement with experimental results, although the magnitudes of strains are less than those determined experimentally.
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