Who should be interested in Use case?
Customers, who need to be sure that the system that is getting built is the one that they want.
客戶，他們需要確定即將構建的系統是他們需要的系統。
Managers, who need to have an overall understanding of what the system will do in order to effectively plan and monitor the project.
經理，他們需要對將著手的系統有一個全局的了解，以便于對項目有效的計劃和監控。
Analysts, who need to describe and document what the system is going to do.
分析員，他們需要對將要著手的系統進行描述和文檔化。
Developers, who need to understand what the system needs to do in order to develop it.
開發人員，他們需要理解系統以便于開發它。
Tester， who need to know what the system is supposed to do so that? they can verify that is does it.
測試人員，他們需要知道期望系統實現的功能，以便于它們驗證系統是執行這些功能。
Technical writers,who need to know what the system is supposed to so that they can describe it.
支持文檔撰寫者，他們需求要知道期望的系統以例描述它。
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User-experience designers, who need to understand the users' goals and how the will use the system to achieve these goals.
用戶體驗設計人員，他們需要理解用戶的目標和他們將怎樣使用系統達到他們的目標。