Free PMI Project Management Professional (PMP) Practice Question

In PERT estimation, the expected duration (TE) is calculated by taking an average of three estimates: the optimistic, the most likely, and the pessimistic. The most likely duration gets more weight because it's the most probable.

Here’s how it works:

• Take the optimistic duration (3 days).
• Multiply the most likely duration (5 days) by 4, because it's considered more reliable.
• Then, add the pessimistic duration (13 days).
• Add them all together: 3 + 4(5) + 13 = 36.
• Divide the total by 6: 36 ÷ 6 = 6 days.

So, the expected duration (TE) is 6 days. This method balances all the estimates while giving more weight to the most likely one.