käyttöskenaariot

Käyttöskenaariot, in English use cases, are descriptions of how a user interacts with a system to achieve a specific goal. They are a fundamental tool in software development, user experience design, and business analysis. A use case typically outlines the steps a user takes and the system's responses to fulfill a particular objective.

The primary purpose of use cases is to capture the functional requirements of a system from an external or user perspective. They help stakeholders understand what the system should do and how it will be used in real-world situations. By focusing on user goals, use cases ensure that the developed system is relevant and meets the needs of its intended audience.

A typical use case description includes the name of the use case, the actor(s) involved (the user or other systems interacting with the system), a brief description, pre-conditions, post-conditions, and the main success scenario. The main success scenario details the step-by-step interaction when everything goes as planned. Alternate flows and exception flows are also often included to describe variations or error conditions.

Use cases are valuable for communication among development teams, clients, and end-users. They provide a common language and a clear understanding of system functionality. Furthermore, they aid in test case development, ensuring that all critical user interactions are validated. By detailing interactions, use cases contribute to building systems that are user-friendly, effective, and meet business objectives.