The use case model

The use case model provides detailed information about the behaviors of the system or application that you are developing. It contains use case diagrams and activity diagrams that describe how users interact with the system.

The use case model identifies the requirements of the system in terms of the functionality that must exist to achieve the goals set out by the user or to solve a problem identified by the user. Uses cases describe the major behaviors that you identify in the requirements and describe the value that the results give the users; they do not describe how the system operates internally. Actors are the users of the system and represent the different roles that people and other systems play when they interact with the system.

Use case diagrams depict the relationships between the uses cases and actors and activity diagrams to describe the flow of objects and control in each identified behavior.

Related tasks
Capturing application requirements in a use case model
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