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It is denoted by an oval shape with the name of a use case written inside the oval shape.

A use case represents a distinct functionality of a system, a component, a package, or a class. Use cases are used to represent high-level functionalities and how the user will handle the system. Use-case diagram notationsįollowing are the common notations used in a use case diagram: Use case diagrams are responsible for visualizing the external things that interact with the part of the system. It models how an external entity interacts with the system to make it work. Use case diagrams capture the dynamic behaviour of a live system. In this UML Diagram tutorial, you will learn more about:Ī Use Case consists of use cases, persons, or various things that are invoking the features called as actors and the elements that are responsible for implementing the use cases. Use-cases are the core concepts of Unified Modelling language modeling. Use cases represent high-level functionalities and how a user will handle the system. Use Cases model the services, tasks, function that a system needs to perform. Use Case Diagram captures the system’s functionality and requirements by using actors and use cases.