IASSC Certified Lean Six Sigma Black Belt (ICBB) — Question 33

Identify the correct option regarding PERT and CPM.

Answer options

• A. PERT and CPM are suitable for a situation which does not have a definite start and a definite end.
• B. In CPM, duration of each activity is known with certainty where in PERT it assumes a probability distribution for the duration of each activity.
• C. In CPM, time estimates are uncertain but in PERT duration of each activity is known with certainty.
• D. PERT emphases both time and cost.

Correct answer: C

Explanation

The correct answer is C because CPM relies on fixed time estimates for activities, while PERT incorporates uncertainty into duration estimates. Options A and D misrepresent the focus of PERT and CPM, and option B incorrectly states the characteristics of each method.