what is PERT AND CPM ? Top 7 difference between PERT AND CPM.

PERT AND CPM

PERT stands for “Program Evaluation And Review Technique" 
CPM stands for "Critical Path Method"

DIFFERENCE BETWEEN PERT AND CPM

PERT
1. A probabilistic model with uncertainty in activity duration 
2. An event-oriented approach.
3. Pert terminology uses words like. network diagram, events, and slack .
4. The use of dummy activities is required for representing the proper sequencing.
5. Pert basically does not demarcate between critical and non-critical activities.
6. Pert finds application in projects where resources are always made available as and when required.
7. Especially suitable in defence projects and R&D where activity times cannot be reliably predicted .

CPM
1. A deterministic model with well-known activity times based upon past experience .it assumed that, the expected time is actually the time taken .
2. An activity-oriented system .
3. CPM terminology employs words like arrow diagram , nodes, and float .
4. The use of dummy activities not necessary . The arrow diagram thus becomes slightly simpler .
5. CPM marks critical activities .
6. CPM is employed to those projects where minimum overall costs is of primary importance There is better utilization of resources .
7. Suitable for problems in industrial setting, planing maintenance, civil construction projects, etc .

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