PERT time estimation: sources for probabilistic activity time In PERT, the expected activity time is computed from three time estimates. Identify the inputs used to determine the probabilistic completion time for an activity.
Mechanical Engineering
Industrial Engineering and Production Management
Difficulty: Medium
Choose an option
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AOptimistic time only
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BPessimistic time only
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CMost likely time only
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DAll of these (optimistic, most likely, pessimistic)
Answer
Correct Answer: All of these (optimistic, most likely, pessimistic)
Explanation
Given dataPERT uses three estimates: optimistic (to), most likely (tm), and pessimistic (tp).
ApproachExpected time (te) is computed as a weighted average:te = (to + 4 tm + tp) / 6
ConclusionTherefore, all three inputs are required.
Final AnswerAll of these (optimistic, most likely, pessimistic).