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The project network for shooting a TV commercial as shown below has a fixed cost
of $85 per day, but money can be saved by shortening the project duration.
Activity
Predecessors
Normal Time
Crash Time (days)
Cost Increase (E)
(1st, 2nd, 3rd day)
A
7
4
25, 45, 65
B
12
10
55, 55
C
A
9
6
35,40, 60
D
A
11
9
30, 55
F
B. C
3
3
c) Draw either an activity on arrow network or an activity on node network to
represent the above project.
d) Using normal times calculate the minimum project completion time and
determine the critical path (s).
e) Which activities should be crashed to obtain the least cost schedule?
Find the cost of this schedule.

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