15 Simple Use Case Diagram. Use case diagrams consists of actors, use cases and their relationships. They document the functionality of a system.
Benefits of use case diagram. They don't show the order in which steps are performed. Use case diagram allows you to model system functions, and present how actors interact with those functions.
A use case diagram captures the business processes carried out in the system.
15 Simple Use Case Diagram. However, this definition is too generic to describe the purpose, as other. Suppose you have to do a use case diagram for this simple problem (that is part of a much bigger exercise i am doing): For relationships among use cases, use arrows. Relationships illustrate relationships between an actor and a use case with a simple line.