An activity model represents the actions, decisions, responsibilities, and dependencies within a process or system.
The model shows how activities follow each other. Moreover, it can show alternative paths and parallel actions. Swimlanes may also assign activities to roles, users, or system components.
Teams use activity models to analyse business processes and system behaviour. Therefore, the models help teams identify missing steps, unclear decisions, and unassigned responsibilities.
An activity model may use UML activity diagrams, BPMN, or another suitable notation. However, each notation serves a different purpose. For example, UML focuses on behaviour, while BPMN provides detailed elements for business processes.
Activity models improve communication and create a clear basis for requirements analysis. In addition, teams can link them to use cases, data models, and detailed requirements.
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