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Use Case Terminology (Actor (Someone or something
outside the system that…
Use Case Terminology
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Assocition
A relationship between an actor and a use case that
indicates that the actor interacts
with the system by means of the
use case.
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Extend
Relationship from an extending use case to a base use case specifying how the behavior defined for the extending use case can be optionally inserted into the behavior defined for the base use case.
Include
Relationship from a base use case to an included use case specifying how the behavior defined for the included use case can be inserted into the behavior defined for the base use case.
Model
A semantically closed abstraction of a system or a complete description of a system from a particular perspective.
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Relationship
A semantic connection between model elements. Examples include associations, dependencies, and generalizations.
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Scenario
A description of a specific sequence of actions. In use case scenarios, specific persons or actor instances replace actors, and onlyone path is taken through the use case’s possible basic and alternate flows.
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Use case diagram
A UML diagram that shows actors, use cases, and their relationships.
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Use case specification
A document that describes a use case. A use case specification’s fundamental parts are the use case name, brief description, precondition, basic flow, postcondition, and alternate flow.