Use case

<p>In both <a href="/facts/Software_engineering/KX6cE9kz">software</a> and <a href="/facts/Systems_engineering/gFwRmkDp">systems engineering</a>, a use case is a structured description of a system’s behavior as it responds to requests from external actors, aiming to achieve a specific goal. It is used to define and validate functional requirements A use case is a list of actions or event steps typically defining the interactions between a role (known in the <a href="/facts/Unified_Modeling_Language/3tlNS0tH">Unified Modeling Language</a> (UML) as an <i><a href="/facts/Actor_(UML)/grUyrKl9">actor</a></i>) and a system to achieve a goal. The actor can be a human or another external system. In systems engineering, use cases are used at a higher level than within <a href="/facts/Software_engineering/KX6cE9kz">software engineering</a>, often representing missions or <a href="/facts/Project_stakeholder/y0en0Bgg">stakeholder</a> goals. The detailed requirements may then be captured in the <a href="/facts/Systems_Modeling_Language/66N9ASg1">Systems Modeling Language</a> (SysML) or as contractual statements.
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Use case open-in-new

Use case