Use Case

A use case is a formal representation of the interactions between a user, referred to as an actor, and a system aimed at achieving a particular objective. It outlines the sequential steps an actor undertakes to perform a task, highlighting both the optimal path and possible deviations or errors. This approach is utilized in system analysis and software engineering to pinpoint, clarify, and structure a system's functional requirements from the perspective of the end-user.

Use cases are essential for articulating a system's functional requirements from the viewpoint of end-users. They foster a common understanding among all parties involved, from developers to management. This consensus ensures that the final product effectively addresses real-world challenges and aligns with business objectives.

By detailing every conceivable user interaction, use cases assist in managing project scope and mitigating feature creep. They also help identify potential issues and exceptions early in the development process, thereby minimizing risks and reducing the need for costly revisions later on. This makes them a crucial basis for developing test cases and user documentation.

Use cases can be utilized across different sectors to outline system functionalities. They offer a clear framework for how users will engage with a system to fulfill their objectives. These scenarios can range from straightforward, routine tasks to intricate business operations.

Although both use cases and user stories describe interactions between users and systems, they serve distinct roles in the product development process.