A construction project has indirect costs totalling $40,000 per week Major activities in the project and their expected durations are shown in the following precedence network:

Crashing costs for each activity are:

a. Determine the minimum-cost crashing plan that will take off six weeks from the project duration.
b. Plot the total cost curve against project duration. What is the optimum number of weeks to crash the project?

9 8 2 2 8-2 3 1 Crashing Costs ($000) Second Week Activity First Week Third Week $18 24 30 15 30 12 $22 25 30 20 25 35 36 26 24 40 40 7 10 10 26 10 15 25 12 13 15