这是制定详细的项目范围管理计划，为将来的项目决策奠定基础所必需的过程。
This is the process necessary for developing a detailed project scope statement as the basis for future project decisions.
项目范围管理计划可以是正式或非正式的，极为详细或相当概括的，具体视项目的需要而定。
The project scope management plan can be informal and broadly framed, or formal and highly detailed, based on the needs of the project.
向开发案例中添加的每一项元素都应该根据期望的效益进行平衡，您需要考虑的方面包括：时间节省、质量获得，或为项目评估、计划和范围管理提供的基础。
Each addition to the development case should be balanced with the expected benefits in terms of time saving, quality gain, or providing a basis for project estimation, planning, and scope management.
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