They can help your team communicate and analyze the scope of your system any scenario in which your system interacts with customers, organizations, or external systems or goals or problems your applications help your customers solve. Use case diagrams are effective and malleable tools. You can also use the diagram to represent and discuss goals that users (or “actors”) achieve with the help of your system or application. Your use case diagram can model different scenarios where your system or application interacts with people, systems, or organizations. They contain just the essential information that helps outline the following: represent the goals of system-user interactions, define and organize the functional requirements in a system, specify the context and requirements of a system, and model the basic flow of events in a use case. Generally, use case diagrams are not very detailed. It’s a powerful tool for communicating your desired system behavior in the language of the user, by specifying all externally visible system behavior. A use case diagram is helpful because it allows you to design a system from the perspective of the end user. It typically depicts the expected behavior of the system: what will happen and when.

This powerful visual framework helps your team quickly illustrate system functionality. A use case diagram is a visual tool that helps you analyze the relationships between personas and use cases.

Use case diagram online free tool