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# Mid - Mid-Term#2 Practice Exam Project Crashing/PERT/LP...

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Mid-Term #2 Practice Exam Project Crashing/PERT/LP Graphical Solution 1. The following data were obtained from a study of the times required to overhaul a chemical plant: NORMAL CRASH ACTIVITY PREDECESSORS TIME COST TIME COST A - 5 4 3 6 B - 5 3 1 5 C A 10 4 5 7 D B 7 4 2 6 E A 6 3 2 5 F C,D 11 6 5 9 G C,D 6 3 4 6 H E,F 5 2 1 4 I G 4 2 1 5 Note: Costs are given in thousands of dollars; time in weeks. (a) Find the project time and cost using normal times everywhere; (b) Compute the marginal crash costs and available compression for all of the activities; (c) Develop the least cost crashing schedules using the path list and breakpoint table analysis described in class, through the fourth iteration in your breakpoint table. (d) By interpolation in your breakpoint table determine the cost of the schedule for 24 days; also determine project completion time for a project budget of \$35,000 dollars. 2. The following data were obtained from a study of the times required to overhaul a

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Mid - Mid-Term#2 Practice Exam Project Crashing/PERT/LP...

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