PK0-003 · Question #246
Given the schedule estimates of Best Case = 2 days, Worst Case = 12 days, and Most Likely = 4 days, calculate PERT.
The correct answer is B. 5 days. This question requires calculating the Program Evaluation and Review Technique (PERT) expected duration using three-point estimates.
Question
Given the schedule estimates of Best Case = 2 days, Worst Case = 12 days, and Most Likely = 4 days, calculate PERT.
Options
- A4 days
- B5 days
- C6 days
- D8 days
How the community answered
(25 responses)- A8% (2)
- B72% (18)
- C4% (1)
- D16% (4)
Why each option
This question requires calculating the Program Evaluation and Review Technique (PERT) expected duration using three-point estimates.
4 days is the 'Most Likely' estimate, not the PERT calculated expected duration.
The PERT formula is (Optimistic + 4 * Most Likely + Pessimistic) / 6. Plugging in the values: (2 + 4*4 + 12) / 6 = (2 + 16 + 12) / 6 = 30 / 6 = 5 days.
6 days is an incorrect calculation based on the PERT formula and given estimates.
8 days is an incorrect calculation based on the PERT formula and given estimates.
Concept tested: PERT estimation calculation
Source: https://www.pmi.org/learning/library/pert-critical-path-scheduling-techniques-6997
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