Reconsider the Lockhead Aircraft Co. problem presented in Prob. 10.4-6 regarding a project to develop a new fighter airplane for the U.S. Air Force. Management is extremely concerned that current plans for this project have a substantial likelihood

(roughly a probability of 0.5) of missing the deadline imposed in the Department of Defense contract to finish within 100 weeks.

The company has a bad record of missing deadlines, and management is worried that doing so again would jeopardize obtaining future contracts for defense work. Furthermore, management would like to avoid the hefty penalties for missing the deadline in the current contract. Therefore, the decision has been made to crash the project, using the CPM method of time-cost trade-offs to determine how to do this in the most economical way. The data needed to apply this method are given next.

These normal times are the rounded estimates of the means obtained from the original data in Prob.