A PERT/CPM activity has an optimistic time estimate of 3 days, a most likely time estimate of 8 days, and a pessimistic time estimate of 10 days. the expected time (in days) of this activity is 7.5.
PERT is a good technique to utilize for projects where it is unknown how much time will be needed to accomplish certain tasks. PERT is primarily used for project scheduling, task organization, and task integration. It offers the project's blueprint and is a useful technique for project evaluation.
CPM is a method that is applied to projects where the amount of time required to complete the project is already known. It is mostly used to estimate the amount of time needed to accomplish a job. The most important road in project management, the critical path, guarantees that the project will be finished in the shortest amount of time possible.
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