通过使用CPM关键路径法，对项目时间的预排和项目活动工期的估算，具体如何对于项目进度进行控制，保证项目如期完成。
CPM critical path by using the method , the pre-project time schedule and estimated duration of project activities , specifically , how to control the project schedule to ensure timely completion of the project .
活动工期估算