Planning and control–Critical Path Method (CPM) & Progamme Evaluation and Review Technique (PERT) Explain what is meant by the Critical Path Method (CPM) and the Programme Evaluation and Review Technique (PERT), as used in project planning and control? Department A is performing a system upgrade project with the following tasks, duration and task dependency relationships. Critical Path Method (CPM) The critical path method (CPM) is a step-by-step technique for process planning that defines critical and non-critical tasks with the goal of avoid time-frame problems and process bottlenecks.The CPM is ideally suited to projects consisting of many activities that interact in a complex method. Programme evaluation and review technique (PERT) The programme evaluation and review technique, or PERT as it is universally known, had its origins in planning and controlling major defence projects in the US Navy. PERT had its most spectacular gains in the highly uncertain environment of space and defence projects. The technique know that activity period and costs in project management are not decision and that probability theory can be applied to estimates, as was mentioned earlier.In this type of network each activity period is estimated on an optimistic, a most likely and a pessimistic basis. CPM and PERT are project planning and control. 5 5 4 4 2 2 2 3 1 1 1 Start 6 6 3 3 2 1 End 1 the project duration is 9 days Task 1,2,4,5,6 are critical path. Task 3 is not in critical path , If task 3 delayed for 2 days will be no effect in the critical path. If crash project schedule to 8 days, we have to employ labor and over time to work in the task.