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GATE 2021 AR – Question 62

Project Management and Professional Practice · Construction project management techniques e.g. PERT, CPM · 2 marks · Numerical answer

Activities P, Q, R, S, T have durations 2, 4, 5, 6, 3 weeks. P’s successor is R; Q’s successors are R and S; R’s successor is T; S and T have none. Find total project duration in weeks, as an integer.

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Correct answer: 12 to 12

Explanation

P finishes at 2 and Q at 4. R waits for both and finishes at 4+5=9; T then finishes at 12. S follows Q and finishes at 4+6=10. The longest completion is 12 weeks on Q–R–T, so the project duration is 12.

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