Question

6. Write a brief note on Time-cost trade off. A project consists
of eight activities including one dummy activity. The normal
and crash time in days and cost in rupees for different activities
are given in table shown below. Determine optimum duration
and associated cost of the project. Indirect cost Rs. 80/- per
day.
Activity Normal Crash Normal Crash
Time Time Cost Cost
(Days) (Days) (Rs.) (Rs.)
1-2
2
2
1.000 1.000
1-3
7 3 500 900
2-3 6 3
300 420
2-4
200
250
3-4 0 0
0
3-5
600 900
4-6
11
600 1000
5-6 6 3 700 910
Also draw the last-cost time scaled network.
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Answer 1

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Answer 2

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