You are in charge of the purchasing, installing, and testing a new 30-ton stamping machine for a major automobile assembly line. It stamps out metal fenders and hoods for vehicles prior to painting them. The goal is to complete the project on time and within budget or you may not have this job next year—the pressure is on! The activities listed are for installing and testing the machine, not the purchase price. 

a. Draw the project network.

b. What is the earliest completion time for this project?

c. What is the largest amount of slack that any activity has in this project?

d. What is the total normal cost of the project?

e. If your boss gives you $5,000 to speed up the original completion time (i.e., project improvement dollars), what activity would you spend the improvement dollars on first?

f. What activity or activities would you crash to complete the project two weeks early from the original project completion time to minimize total crash costs?

 

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Activity A B с D E EFG G Immediate Predecessor(s) A,B A, B C, D D LL E,F Normal Time in days 2 1 5 4 2 4 3 Crash Time in days 2 1 3 2 1 3 3 2 2 Normal Cost $15,000 $12,000 $18,000 $12,000 $22,000 $32,000 $19,000 Crash Cost $15,000 $12,000 $24,000 $16,000 $23,500 $36,000 $20,000