Can any Friend explain this

Submitted by Vishwanath on Wed, 07/17/2013 - 14:48

 1)      Task            Org. Dur(In months)  Crash Dur.(in months)      Org. Cost     Crash Cost

         M                       5                                                    1                             $1600            $1700

         N                       6                                                      2                             $1800             $ 1900

         O                       7                                                      1                              $2000            $ 2050

         P                         8                                                     1                              $3000             $3200

         Q                      13                                                     3                              $2500             $2650


Considering 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?

  1. Task Q
  2. Task N and Task O
  3. Either Task Q or Task N and Task O
  4. Task N and Task P 

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elthox

Wed, 07/17/2013 - 16:10

 Q, crash cost is lower and provides 3 months to make the float 0.

Vishwanath

Wed, 07/17/2013 - 16:12

 Kindly elaborate please

pmpnewster

Wed, 07/17/2013 - 16:42

 

You have Crash Duration as a column header. Do you mean post-crash duration of the task? OR is it the saving in time? Pls clarify.

Regards.

 

jvleminc's picture

jvleminc

Wed, 07/17/2013 - 21:54

Q, crashing this one activity yields the 3 months and the cost  is lower than any of the other combinations that yields the same duration.

signor_rk

Fri, 08/15/2014 - 06:57

Let us see the possibilities as follows:
Option # 1 Task Q : Crashed by 3 months with an additional Cost of ($2650 - $2500)= $150
Option #2 Task N and Task O: Crashed by 3(=2+1) months with an additional Cost of {($1900-$1800)+($2050-$2000)}=$150
Option # 3 Either Task Q or Task N and Task O : BEST Possible Option
Option # 4 Task N and Task P : Crashed by 3(=2+1) months with an additional Cost of {($1900-$1800)+($3200-$3000)}=$300 , not possible costing more.
So , the best option is Option # 3 Either Task Q or Task N and Task O
Thanks & regards,
Ranjit

Frances Tessler

Thu, 10/16/2014 - 21:27

I agree with Q

dipti1pmp

Tue, 10/28/2014 - 10:07

this question has 2 answers either n+0 or Q alone.

here is the explanation:

the additional expenses for q is 150$ and n+o is also 150 $ rest is 200$......so answer is 3.