7. Fusion Engineering Inc. is designing a new product for welding two different allays.
The company has limited time and resources to complete the project. The following
activity information is available.
Activity (i, j) Immediate
predecessor(s)
Normal
Time
Days
Normal cost
$
Crash cost
per day $
Crash time
Days
A (1, 2)
B (2, 3)
C (2, 4)
D (3, 6)
E (4, 5)
F (5, 6)
-
A
A
B
C
B, E
4
5
4
3
3
4
400
800
520
600
255
600
125
200
150
225
100
175
3
4
2
2
2
2
a) Draw the project network,
b) Find the critical path.