What is the difference between PERT MEAN and Most Likely?

It is the contingency of a work package

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PERT

A technique for estimating when there is uncertainty with the individual activity estimates.

Purpose: Knowing the weighted average and variances for each activity allows the project planner to compute the probability of meeting different project duration.

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PERT—Program Evaluation Review Technique

•Assumes each activity duration has a range that statistically follows a beta distribution.

•Uses three time estimates for each activity: optimistic, pessimistic, and a weighted average to represent activity durations.

–Knowing the weighted average and variances for each activity allows the project planner to compute the probability of meeting different project durations.

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