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Chapter 4 Requirement Modeling Introduction Requirement modeling in software engineering is essentially the planning stage of a software application or system. The requirements can be obvious or hidden, known or unknown, expected or unexpected from the client’s point of view. Requirement modeling uses a combination of text and diagrammatic forms to depict requirements in a way that is relatively easy to understand, and more important, straightforward to review for correctness, completeness, and consistency. Requirements modeling comprises several stages, or ‘patterns’ like scenario-based modeling, data modeling, flow-oriented modeling, class-based modeling and behavioral modeling. Each of these stages/patterns examines the same problem from a different perspective. Requirement models (also called analysis models) represent customer requirements by depicting the software in three different domains like the information domain, the functional domain, and the behavioral domain. Also, ...
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