Difference between CPM and PERT Method in project management

CPMPERT
CPM stands for critical path methodPERT stands for program evaluation and review technique
It is activity based methodIt 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 estimateIt is probabilistic method with three time estimate namely optimistic, most probable and pessimistic
It is concerned with control of cost and timeIt is only concerned with control of time
Crashing of activities is possibleCrashing of activities is not possible
Resources like manpower , materials , etc. are unlimitedResources are limited
It has reasonable time estimate for the projectIt has high precision time estimate

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