The following CPM network has estimates of the normal time in weeks listed for the activities:

a. Identify the critical path.

b. What is the length of time to complete the project?

c. Which activities have slack, and how much?

d. Here is a table of normal and crash times and costs. Which activities would you shorten to cut two weeks from the schedule in a rational fashion? What would be the incremental cost? Is the critical path changed?

Activity Normal Time Crash Time Normal Cost Crash Cost A 7 6 $7,000 $ 8,000 B 2 1 5,000 7,000 C 4 3 9,000 10,200 D 5 4 3,000 4,500 E 2 1 2,000 3,000 F 4 2 4,000 7,000 G 5 4 5,000 8,000 LO5-1