![]() Place actors outside the system's boundaries.ĭraw use cases using ovals. Basic Use Case Diagram Symbols and Notationsĭraw your system's boundaries using a rectangle that contains use cases. Use case diagrams specify how the system interacts with actors without worrying about the details of how that functionality is implemented. They provide a good high level analysis from outside the system. They also help identify any internal or external factors that may influence the system and should be taken into consideration. ![]() Use case diagrams are valuable for visualizing the functional requirements of a system that will translate into design choices and development priorities. The "actors" are people or entities operating under defined roles within the system. In this context, a "system" is something being developed or operated, such as a web site. Use cases are a set of actions, services, and functions that the system needs to perform. ![]() Use case diagrams model the functionality of a system using actors and use cases. Use Case Diagram What is a Use Case Diagram?Ī use case diagram is a dynamic or behavior diagram in UML. ![]()
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