Question: The following data pertains to a certain project: Immediate Normal Normal Crash Crash Activity Predecessor. Time(weeks) Cost Time(weeks) Cost A __ 10 30 8 70

The following data pertains to a certain project:

Immediate Normal Normal Crash Crash

Activity Predecessor. Time(weeks) Cost Time(weeks) Cost

A __ 10 30 8 70

B A 8 120 6 150

C B 10 100 7 160

D A 7 40 6 50

E D 10 50 8 75

F C, E 3 60 1 95

  1. Show the project network
  2. Assume the company wants to complete the project in 28 weeks. Should any activity be crashed? Explain.
  3. Which activities should be crashed, by how much, and at what total crashing cost, if the objective is to minimize the total crashing costs, while meeting the deadline of 28 weeks?
  4. Assuming there is a penalty of 20 paid for each week the project is not completed beyond the deadline of 28 weeks. What is the optimal crash plan that minimizes total costs?

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