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DISCUSSION QUESTIONS AND PROBLEMS

417

(b) What is the probability that the project will take

longer than 40 weeks?

(c) What is the probability that the project will be

finished in 46 weeks or less?

(d) What is the probability that the project will take

longer than 46 weeks?

(e) The project manager wishes to set the due date

for the completion of the project so that there

is a 90% chance of finishing on schedule. Thus,

there would only be a 10% chance the proj-

ect would take longer than this due date. What

should this due date be?/nH

7

2:11-22 A project was planned using PERT with three time

estimates. The expected completion time of the

project was determined to be 40 weeks. The vari-

ance of the critical path is 9.

(a) What is the probability that the project will be

finished in 40 weeks or less?