What is the total project completion time? Round your answer to the nearest whole number.  ___ weeks What is the lowest cost solution if the state wants to complete the project three weeks early? Round your answer for the project duration to the nearest whole number and the answer for the total cost to the nearest dollar. The total cost of a(an) ___ -week project-completion schedule is $ __  .

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Environment Recycling, Inc. must clean up a large automobile tire dump under a state environmental cleanup contract. Suppose that some of the activities in the Environment Recycling, Inc. project can be crashed.The table below shows the crash times and costs associated with performing the activities at their original (normal) times and also for the crash times (all times are in weeks).

 

    Normal Crash Normal Crash
Activity Predecessor(s) Time Time Cost Cost
A   6 5 $490   $640  
B   A 9 7 1,800   2,400  
C   A 8 7 860   1,060  
D   7 6 620   920  
E   B, C, D 9 7 1,900   2,300  
F   D 4 2 820   1,320  
G   D 4 3 620   870  
H   E 5 4 500   710  
I   F, G, H 7 5 950   1,550  

 

  1. Choose the correct network for the project.

    The correct network is  C .

 

  1. Identify the critical path.

    The critical path is  A-B-E-H-I.

  2. What is the total project completion time? Round your answer to the nearest whole number.

     ___ weeks

  3. What is the lowest cost solution if the state wants to complete the project three weeks early? Round your answer for the project duration to the nearest whole number and the answer for the total cost to the nearest dollar.

    The total cost of a(an) ___ -week project-completion schedule is $ __  .

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