Usage Domain Analysis

Process

The analysis of the usage domain is about how somebody, a person or another system, interacts with the system-to-be. The two suggested activities, Use Case Candidates and Actor Candidates may be a parallel process. In some cases there are obvious use cases, but in other cases there may not be an immediate obvious candidate. In such cases an analysis of the possible actors may reveal use cases. The actor analysis may be performed in parallel with or after the Interface Analysis, especially the interface with other systems.

So jumping back and forth between several activities should not deter the developer to search for all possible candidates be it actors or use cases.