那些没有需求变更控制流程的团队只好把来自各个角落的变更请求全部公布出来，进而常常难于否决这些请求。
Teams that do not have a requirements change control process must field change requests from all quarters and often have difficulty saying "no."
它规约了开发人员必须收集的信息和控制需求变更的机制。
It specifies information the developers must collect and mechanisms for controlling requirements changes.
优化和控制需求变更。
并且当有需求变更时，此工具可以给项目负责人提供变更影响分析，便于负责人控制整个开发过程。
Also, when some requirements must be changed, this tool can provide impact analysis for the project leader. And then the leader can control the whole developing process.
并且当有需求变更时，此工具可以给项目负责人提供变更影响分析，便于负责人控制整个开发过程。
Also, when some requirements must be changed, this tool can provide impact analysis for the project leader. And then the leader can control the whole developing process.
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