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.
客户，他们需要确定即将构建的系统是他们需要的系统。
Managers, who need to have an overall understanding of what the system will do in order to effectively plan and monitor the project.
经理，他们需要对将着手的系统有一个全局的了解，以便于对项目有效的计划和监控。
Analysts, who need to describe and document what the system is going to do.
分析员，他们需要对将要着手的系统进行描述和文档化。
Developers, who need to understand what the system needs to do in order to develop it.
开发人员，他们需要理解系统以便于开发它。
Tester， who need to know what the system is supposed to do so that they can verify that is does it.
测试人员，他们需要知道期望系统实现的功能，以便于它们验证系统是执行这些功能。
Technical writers,who need to know what the system is supposed to so that they can describe it.
支持文档撰写者，他们需求要知道期望的系统以例描述它。
User-experience designers, who need to understand the users' goals and how the will use the system to achieve these goals.
用户体验设计人员，他们需要理解用户的目标和他们将怎样使用系统达到他们的目标。