Use the information contained below to compress one time unit per move using the

Question

Use the information contained below to compress one time unit per move using the least cost method. Reduce the schedule until you reach the crash point of the network. For each move identify what activity(s) was crashed and the adjusted total cost.

To compress from time period 16 to time 15 crash the following activity(s)

What is the adjusted total cost at time period 11?

To compress from time period 15 to time 14 crash the following activity(s)

What is the adjusted total cost at time period 10?

To compress from time period 14 to time 13 crash the following activity(s)

What is the adjusted total cost at time period 13?

What is the crash point of the network?

Activity Crash cost Maximum ID(Slope) Crash Time Normal time 100 80 60 40 40 40 20 Normal cost 150 100 200 200 200 150 200 200 2 3 2 3 Total direct normal costs $1,400 1 X Completion time: 16 Total cost $1,400

Explanation / Answer

So the current situation is :

To compress from 16 to 15:

The additional cost is 20

Task G is Crashed.

To compress from time period 15 to time 14 crash the following activity(s)

So G is compressed and the additional cost is $20.

To compress from time period 14 to time 13 crash the following activity(s)

To crash G, and the additional cost is $20

So the Crash point is 6 weeks and the cost is $ 2000

Dec Var Assumed cost Task Pre Start End Time to take Normal T Crash Normal cost Crash cost Per time Crash Cost Crash A 0 2 2 <= 2 >= 1 150 180 100 150 No B A 2 5 3 <= 3 >= 1 100 146 80 100 No C B 5 7 2 <= 2 >= 1 200 210 60 200 No D B 5 10 5 <= 5 >= 1 200 72 40 200 No E A 2 7 5 <= 5 >= 2 200 160 40 200 No F C 7 10 3 <= 3 >= 2 150 257 40 150 No G D 10 15 5 <= 5 >= 1 200 96 20 200 No H E,F,G 15 16 1 <= 1 >= 1 200 132 0 200 No 0 0 0 Finish Ending 16 <= Total cost 1400 Deadline 16 Minimize Obj Func

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