Difference between CPM and PERT Method in project management

CPM stands for critical path method PERT stands for program evaluation and review technique
It is activity based method It is event based method
It is used in repetitive works like construction It is used in non-repetitive works like research
It is deterministic method with single time estimate It is probabilistic method with three time estimate namely optimistic, most probable and pessimistic
It is concerned with control of cost and time It is only concerned with control of time
Crashing of activities is possible Crashing of activities is not possible
Resources like manpower , materials , etc. are unlimited Resources are limited
It has reasonable time estimate for the project It has high precision time estimate

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