Kasutusülesanne

Kasutusülesanne, often translated as "use case" in English, is a concept used in software engineering and systems analysis to describe how a user interacts with a system to achieve a specific goal. It outlines a sequence of actions and events that occur when a user engages with a system's functionality. Each use case typically involves an actor, which is an external entity (human or another system) that interacts with the system, and the system itself.

The primary purpose of a use case is to capture the functional requirements of a system from the perspective of the end-user. It focuses on what the system does, rather than how it does it. A well-defined use case includes a clear description of the goal, the steps involved in achieving that goal, any preconditions that must be met, and postconditions that describe the state of the system after the use case is successfully completed. Variations, alternative flows, and exception conditions are also often documented to provide a comprehensive understanding of the system's behavior.

Use cases are valuable tools for communication between stakeholders, including clients, developers, and testers. They help ensure that the system being developed meets the actual needs of its users. By providing a structured way to describe interactions, use cases facilitate the design, development, and testing of software, contributing to the creation of more user-friendly and effective systems. They serve as a foundation for creating user stories and test scenarios, making them an integral part of agile development methodologies.