Difference between PERT and CPM

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Difference between PERT and CPM :

S.No.PERT (Project Evaluation and Review Technique)CPM (Critical Path Method)
1.PERT is a project management technique, used to manage uncertain (i.e. time is unknown) activities of a project.CPM is that technique of project management which is used to manage only certain (i.e., time is known) activities of any project.
2.It is event oriented technique, which means that network is made up on the basis of event.It is an activity oriented technique, which means that network is made up on the basis of activities.
3.It is a probability model.It is a deterministic model.
4.It mainly focuses on time.It mainly focuses on Time-cost trade off( schedule that leads to minimum cost).
5.It is appropriate for high precision time estimation.It is appropriate for reasonable time estimation.
6.It has non-repetitive nature of job.It has repetitive nature of job.
7.There is no chance of crashing, as there is no certainty of time.There may be crashing because of certain time limitation.
8.It doesn’t use any dummy activities.It uses dummy activities for representing sequence of activities.
9.It is suitable for projects related to research and development.It is suitable for construction projects.

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Arbaj Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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