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Use Cases: Patterns and Blueprints by Karin Palmkvist, Gunnar Övergaard

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Chapter 23. Multiple Actors

Intent

Capture commonalities between actors while keeping separate roles apart.

Characteristics: Very common. Basic.

Keywords: Common role, different roles, generalization of actors, overlapping actors, several users of a use case.

Patterns

Multiple Actors: Distinct Roles

Model

Model

Description

The Multiple Actors: Distinct Roles pattern consists of one use case and (at least) two actors.

Applicability

This pattern is used when the two actors play different roles toward the use case; that is, they interact differently with the use case.

Type

Structure pattern.

Multiple Actors: Common Role

Model

Description

In an alternative pattern, the two ...

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