Crashing Question - What is the correct answer along with reason
Submitted by lcmsrp on Wed, 08/26/2015 - 15:31
Five tasks have to be completed one after another in your project. The Contract with your Sponsor contains very strict penalties for delays. The schedule reveals that the project has a negative float of three months, which of the following task(s) should be crashed to bring the project on schedule? Please refer to the table given below:
Task Original Duration (months) Crash Savings (months) Original Cost Crash Cost
M 5 1 $1,600 $1,700
N 6 2 $1,800 $1,900
O 7 1 $2,000 $2,050
P 8 1 $3,000 $3,200
Q 13 3 $2,500 $2,650
Choice 1 Task Q
Choice 2 Task N and Task O together
Choice 3 Either Task Q or Task N and Task O together
Choice 4 Task N and Task P together
Forums:
riyerashwin
Thu, 08/27/2015 - 05:08
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Crashing of both Task Q and
Crashing of both Task Q and (Task O and Task N) will save 3 months and would cost 150 $. But as the schedule has a negative float which means it is a critical path, we should see the activity at the earlier in critical path. Hence we should Crash Task N and O.
I would go with Choice 2.
May I know the answer please ?
Thanks,
Ashwin
NISHA
Thu, 08/27/2015 - 05:26
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Hi
As the question is stating that we have negative float of 3 months..so we need to crash the schedule (3 months) for min increase in the cost.
If you see that Either task Q can be crashed for 3 months as the increased cost is 150 Rps or Task N and Task O can be crashed together as here also the increase in cost is 150 for 3 months.
So the answer will be Choice 3rd.