The Top 10 Use-Case Pitfalls

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本文列举了在实际项目中使用用例时遇到的十大常见问题，包括系统边界不明确、用例视角错误、参与者名称不一致等问题。

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The Top 10 Use-Case Pitfalls

1. The system boundary is undefined or inconstant.
2. The use cases are written from the system's (not the actors') point of view.
3. The actor names are inconsistent.
4. There are too many use cases.
5. The actor-to-use case relationships resemble a spider's web.
6. The use-case specifications are too long.
7. The use-case specifications are confusing.
8. The use case doesn't correctly describe functional entitlement.
9. The customer doesn't understand the use cases.
10. The use cases are never finished.

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From Lilly, S., Use Case Pitfalls: Top 10 Problems from Real Projects Using Use Cases, Proceedings of TOOLS USA '99, IEEE Computer Society, 1999.