Question: The project manager, Sean Murphy, has concluded that he cannot meet the deadline by performing all these activities in the normal way. Therefore, Sean has

The project manager, Sean Murphy, has concluded that he cannot meet the deadline by performing all these activities in the normal way. Therefore, Sean has decided to use the CPM method of time-cost trade-offs to determine the most economical way of crashing the project to meet the deadline. He has gathered the following data for the four activities.

Activity	Normal Time	Crash Time	Normal Cost	Crash Cost
A	8 months	5 months	26700	41700
B	9 months	7 months	21700	31700
C	6 months	4 months	17700	25700
D	7 months	4 months	28700	46700

Use marginal cost analysis or Excel to determine the cost of completing the project in 12 months.

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