In PERT, three time estimates (optimistic, most likely, and pessimistic) provide an estimate of the mean and variance for each activity, based on the normal distribution.

Name: In PERT, three time estimates (optimistic, most likely, and pessimistic) provide an estimate of the mean and variance for each activity, based on the normal distribution.
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Quizplus · Accepted Answer

PERT uses the beta distribution, not the normal distribution, to model the variability in activity times based on three time estimates.

In PERT, Three Time Estimates (Optimistic, Most Likely, and Pessimistic)