Program (Project) Management and Review Technique (PERT) is one of the best approach to manage the projects where time needed to complete different activities are not known
On the other hand, Critical Path Method or CPM, is apt for the projects which are recurring in nature.
Here the difference among both of them is described the following table:
| BASIS FOR COMPARISON | PERT | CPM |
| Meaning | PERT is a project management technique, used to manage uncertain activities of a project. | CPM is a statistical technique of project management that manages well-defined activities of a project. |
| What is it? | A technique of planning and control of time. | A method to control cost and time. |
| Focuses on | Time | Time-cost trade-off |
| Management of | Unpredictable Activities | Predictable activities |
| Nature of jobs | Non-repetitive nature | Repetitive nature |
| Critical and Non-critical activities | No differentiation | Differentiated |
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