GATE | GATE IT 2006 | Question 83

A software project has four phases P1, P2, P3 and P4. Of these phases, P1 Is the first one and needs to be completed before any other phase can commence. Phases P2 and P3 can be executed in parallel. Phase P4 cannot commence until both P2 and P3 are completed. The optimistic, most likely, and pessimistic estimates of the phase completion times in days, for Pl, P2, P3 and P4 are, respectively, (11, 15, 25), (7, 8, 15), (8, 9, 22), and (3, 8, 19).

The critical path for the above project and the slack of P2 are, respectively,
(A) P1-P2-P4, 1 day
(B) P1-P3-P4, 1 day
(C) P1-P3-P4, 2 days
(D) P1-P2-P4, 2 days

Answer: (C)


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