Beginning C# 2008 Objects: From Concept to Code

9.4. Matching Up Use Cases with Actors

Another important step is to match up use cases with actors. The relationship between actors and use cases is potentially many-to-many, in that the same actor might initiate many different use cases, and a single use case might be relevant to many different actors. By cross-referencing actors with use cases, we ensure the following:

• We didn't identify an actor who, in the final analysis, really has no use for the system after all.

• Conversely, that we didn't specify a use case that nobody really cares about after all.

• And most important of all, it enables each actor to focus on the individual part of the system when they are reviewing the use case diagram to make sure that an important requirement the actor ...