s) The R&D department is planning to bid on a large project for the development of a new communication system for commercial planes. The accompanying table shows the activities, times, and sequences required:

ACTIVITY IMMEDIATE PREDECESSOR TIME (WEEKS)

A3

BA2

CA4

DA4

EB6

F C,D 6

G D,F 2

HD3

I E, G, H 3

a) Draw the project network diagram with early start, early finish, late start, late finish and slack. What is the critical path?

b) Suppose you want to shorten the completion time as much as possible, and you have the option of shortening any or all of B, C, D, and G each one week. Which would you shorten? What is the new critical path? What is the earliest completion time for the new critical path?