Visual Modeling with Rational Rose 2002 and UML

Summary

System Behavior is documented in a use case model that illustrates the system's intended functions (use cases), its surroundings (actors), and the relationships between the use cases and actors (use case diagrams). The most important role of a use case model is to communicate the system's functionality and behavior to the customer or end user.

The use case model starts in the Inception Phase with the identification of the actors and the principal use cases for the system. The model is then matured in the Elaboration Phase.

Actors are not part of the system—they represent anyone or anything that must interact with the system under development. Use cases represent the functionality provided by the system. They model a dialogue between an ...