关键路径-----工程工期控制问题已知某工程(p1,p2,p3．．．,p11),每个子工程的工期、各子工程以用各了工程与总工程之间的关系如图1-1所示，现在想缩短该工程的总工期，问要缩短哪些了工程的工期，才能达到缩短该工程总工期的目标------ Works project critical path problem is known to control a project (p1, p2, p3 ..., p11), each sub-project period, the sub-projects in order to use all the engineering and the relationship between the total project, such as shown in Figure 1-1, and now would like to shorten the total duration of the project and asked what to shorten the project period in order to achieve shorter total duration of the project objectives