ABSTRACT
This chapter demonstrates how to place actors and use cases in a visual format. The actors are all outside of the boundary and the use cases are all inside. Although the boundary line is optional in the Unified Modeling Language (UML) standard , it is advisable to draw it whenever possible. If the modeling tool does not support the drawing of a boundary, creating a visual arrangement by keeping the use cases all together in the middle of the diagram surrounded by actors is a good option for the aesthetic quality of a use case diagram. Actors can also represent an interface to another system or an external device. The effort in identifying, naming, and diagramming actors and use cases needs to be complemented by proper naming of the use case diagrams. There is no mandated standard in the UML for naming a use case diagram.
