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 .