System
Draw your system’s boundaries using a rectangle that contains use cases. Place actors outside the system’s boundaries.
Use CaseDraw use cases using ovals. Label the ovals with verbs that represent the system’s functions.
ActorsActors are the users of a system. When one system is the actor of another system, label the actor system with the actor stereotype.
RelationshipsIllustrate relationships between an actor and a use case with a simple line. For relationships among use cases, use arrows labeled either “uses” or “extends.” A “uses” relationship indicates that one use case is needed by another in order to perform a task. An “extends” relationship indicates alternative options under a certain use case.
