95 evaluating tools due to the many different kinds

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9.5 Evaluating Tools Due to the many different kinds of tools that are available, evaluating tools with regard to their adequacy to support requirements engineering is very tedious and challenging in practice. Views on tools in requirements engineering To evaluate the tools as objectively as possible, different views on the tools in requirements engineering should be adopted. By defining differ- ent tool views, it is possible to analyze the adequacy of a tool systematically and to prioritize the tool requirements individually. Figure 9-1 shows views that could be used to evaluate tool adequacy in requirements engi- neering.
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9.5 Evaluating Tools 145 Figure 9-1 Views on a requirements engineering tool For each view, criteria should be defined that are tailored toward the core aspects of the respective perspective. 9.5.1 Project View Project support The project view shows the extent to which the tool can support the project. Relevant criteria are support during project preparation, project planning, and project execution. With regard to project preparation, crite- ria can be considered that pertain to the definition of project-specific information types and documents. With regard to project planning, the scope of defined milestones as well as how information and documents that are created by means of the tool pertain to the milestones. Project exe- cution comprises criteria that pertain to the scope of project control and project lead on the basis of information and documents that are created with the tool.
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146 9 Tool Support 9.5.2 User View Perspective of the future users The user view considers the requirements for the tool that emerge out of the perspective of the users (e.g., multi-user capability). The evaluation from the perspective of the user is focused on tool usage, mapping of roles, and support of group work. In detail, this means that the different stake- holders that are involved in a development project must be adequately mapped by appropriate user management and access rights management. This enables the users to gain the appropriate access to the tool functions and the stored information, depending on their respective role. 9.5.3 Product View Tool functions The product view contains the functionalities that the tool possesses (e.g., different documentation types for requirements). Among other things, the supported document types, views, and reports that can be generated, as well as traceability between the selected products, are considered in this view. 9.5.4 Process View Method support offered by the tool The process view focuses on the method support offered by the tool (e.g., possible guidance, maintenance of traceability relations). Considerations of the process view comprise the ability to document activities within the tool as well as the extent to which the tool offers method guidance. With regard to method guidance, different degrees of obligation can be distin- guished. Method guidance can be strict and restrictive or offer more leni- ent suggestions and hints. Along with the degree of method support that
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