Process control requirements of the position or speed low voltage motors using VVVF, the brake.
工艺流程要求调速或定位控制的低压电机采用变频调速，制动。
RUP adds structure to an agile approach by focusing on driving out requirements uncertainty early and tightening process control naturally as the project progresses toward completion.
RUP 通过在早期逐出需求的不确定性将结构添加到一个敏捷方法中，并且随着项目的不断推进很自然地绷紧了处理过程的控制。
Teams that do not have a requirements change control process must field change requests from all quarters and often have difficulty saying "no."
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。
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