In PERT analysis, individual activity durations are assumed to follow a probability distribution because:
Choose the correct answer
Normal distribution best fits all construction activities
Beta distribution is bounded (has minimum and maximum values), suitable for activity durations
Poisson distribution applies to random events on construction sites
Exponential distribution models the decay of activity uncertainty over time
Correct Answer
B. Beta distribution is bounded (has minimum and maximum values), suitable for activity durations
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
PERT uses the Beta distribution because activity durations are bounded: they cannot be negative and have a definite maximum. Beta is flexible — it can be symmetric or skewed — and requires only three time estimates (a, m, b). The project duration approximates a normal distribution via CLT.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to AE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.