What Is the Formula for Expected Duration in Project Management?

Learn the PERT formula for expected duration: (Optimistic + 4 × Most Likely + Pessimistic) ÷ 6 to estimate project task timelines accurately.

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The formula for expected duration in project management, especially using PERT (Program Evaluation Review Technique), is (Optimistic Time + 4 × Most Likely Time + Pessimistic Time) / 6. This formula helps to estimate the time required for a task by considering different scenarios, providing a balanced outlook.

FAQs & Answers

  1. What is the expected duration formula in PERT? In PERT, the expected duration is calculated using the formula: (Optimistic Time + 4 × Most Likely Time + Pessimistic Time) divided by 6.
  2. Why is the PERT expected duration formula weighted towards the most likely time? The formula multiplies the most likely time by 4 to give it greater weight, providing a more balanced and realistic estimate between optimistic and pessimistic scenarios.
  3. How does expected duration help in project management? Expected duration offers a realistic estimate of task timelines, accounting for uncertainty and helping project managers plan and allocate resources effectively.

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