A project manager may use essential use cases to determine how many iterations will be required.
项目经理可以使用基本的使用用例来确定需要多少次迭代。
Essential use cases are abstract, lightweight, technology-free dialogues between user and system.
本质用例描述了用户与系统间抽象、轻量级和技术无关的对话过程。
The essential criterion for deciding whether to break use cases apart is whether their goals are different.
决定是否分隔用例的本质标准是他们的目标是否不同。
Part 2 of this series will demonstrate how to define requirements and create use cases for services that are an essential part of your SOA.
这个系列的第2部分将讨论，服务作为您的SOA不可缺少的一部分，我们如何对它进行需求定义并为它创建用例。
If you are not a user of the existing environment, this is essential to ensure that no significant use cases have been overlooked.
如果您还不是已存在环境的用户，那么您要确保没有忽略重要的用例。
If you are not a user of the existing environment, this is essential to ensure that no significant use cases have been overlooked.
如果您还不是已存在环境的用户，那么您要确保没有忽略重要的用例。
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