A good use case closes the loop between business requirement gathering, software construction, and acceptance testing.
好的用例完成业务需求收集、软件构造和验收测试之间的循环。
2
Delays getting client to sign-off on acceptance tests – this is true not only for sign-off but also getting client time for resolving requirement issues, give feedback on demos etc.
客户签收验收测试时的延迟——不仅在这方面，还包括让客户解决需求问题、提供演示反馈等方面。
3
Where the customer provides no documented statement of requirement, the customer requirements shall be confirmed by the organization before acceptance.