Understanding the difference between use case diagram and activity diagram is essential for anyone involved in system analysis, software design, or process modeling. While both are part of the Unified Modeling Language (UML) suite, they serve distinct purposes and visualize different aspects of a system. This guide breaks down their purposes, notations, and practical applications, helping you understand when to use each diagram, and how they complement one another.
What is a UML Use Case Diagram A UML (Unified Modeling Language) use case diagram is a visual representation of the interactions between actors (users or external systems) and a system under consideration. It depicts the functionality or behavior of a system from the user’s perspective. Use case diagrams capture the functional requirements of a system and help to identify how different actors interact with the system to achieve specific goals or tasks.
