本文提供了一套实用的问题清单，帮助软件开发者和架构师更好地识别系统中的用例。通过询问有关参与者需求、系统状态变化通知、外部事件影响及报告生成等问题，可以更全面地理解系统功能和交互方式。
Here is a helpful list of questions that you can ask when trying to identify use cases
- what funcitons will specify actor want from the system?
- does the system store and retrieve information? if so,which actors trigger this behavior?
- what happens when the system changes state? Are any actors notified?
- do any external events affect the system? what notifies the system about those events?
- does the system interact with any external system?
- does the system generate any reports?
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