PERT Analysis MCQ with answer and solution

Concept

Comparison between PERT and CPM network techniques.

Step-by-step solution

1. Understand the core nature of PERT: It deals with probabilistic time estimates (three-time estimates: to, tm, tp) and is used for non-repetitive or R&D projects. 2. Understand the core nature of CPM: It deals with deterministic time estimates (single time estimate) and is used for repetitive construction projects. 3. Match these definitions with the given options to find that option (A) is correct.

Explanation

PERT (Program Evaluation and Review Technique) is event-oriented and uses probabilistic time estimates (Optimistic, Most Likely, Pessimistic) to handle uncertainty in R&D projects. CPM (Critical Path Method) is activity-oriented and uses deterministic time estimates, making it suitable for repetitive construction projects where activity durations are well-known.

Why the other options are wrong

B: PERT is used for research projects, whereas CPM is used for repetitive projects. C: CPM is typically considered more cost-oriented (crash cost optimization), while PERT focuses primarily on time/schedule uncertainty. D: CPM uses a single time estimate, while PERT uses three time estimates.

Shortcut

PERT = Probabilistic, R&D, Event-oriented; CPM = Deterministic, Construction, Activity-oriented.

Common mistake

Confusing the time estimates and project types between PERT and CPM (e.g., thinking PERT is for repetitive projects).