Tool Mentor: Structuring the Use-Case ModelPurposeThis tool mentor describes how to use Rational Rose® to document relationships between actors and between use cases. Related Rational Unified Process activities: Structure the Use-Case Model OverviewThe following is a summary of the steps you perform to document relationships between actors and between use cases:
For detailed information about Use Case Diagrams, see:
1. Document
Actor-Generalizations
You can insert a generalization relationship between one business actor and another business actor in a use-case diagram by using the Generalization drawing tool from the use-case diagram toolbox. Once you've created the relationship, you can describe it by adding text to the documentation field of the Generalize Specification dialog.
2. Document
Include-Relationships Between Use Cases
To create an includes relationship between two use cases in a use case diagram, you first create an association between the two use cases, then assign an includes stereotype to the association. You use the includes stereotype when one use case employs the functionality of another use case. The use case being used typically contains functionality that a number of other use cases may need or want. Once you have created the association between use cases, you can:
3. Document
Extend-Relationships Between Use Cases
To create an extends relationship between two use cases in a use case diagram, you first draw an association between the two use cases, then assign an extends stereotype to the association. You use the extends stereotype to express optional or conditional behavior for a use case. Once you have created the association between use cases, you can:
4. Document Use-Case
Generalizations
You can create a generalization relationship from one business use case to another use case when one use case provides common functionality (for example, when you have an abstract use case that provides common functionality to concrete use cases). Once you have created a generalization relationship between use cases, you can describe the relationship by adding text to the Documentation field of the Generalization Specification. |
Rational Unified
Process |