What Are Actors in Use Case Diagrams? Actors in a use case diagram represent the roles that interact with a system. They can be individuals, external systems, or organizations that exchange information or perform actions with the system being modeled. Their main purpose is to define who uses the system and what they expect it to do, helping clearly establish boundaries between the system and its environment.
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.