Three activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical). Activity details are in the following table:
|
Activity
|
Predecessor
|
Normal Time
|
Normal Cost
|
Crash Time
|
Crash Cost
|
|
A
|
-
|
7 days
|
$6,000
|
6 days
|
$6,600
|
|
B
|
A
|
4 days
|
1,200
|
2 days
|
3,000
|
|
C
|
B
|
11 days
|
4,000
|
9 days
|
6,000
|
a) What action would you take to reduce the critical path by 1 day?
b) Assuming no other paths become critical, what action would you take to reduce the critical path one additional day?
c) What is the total cost of the 2-day reduction?