The Crush-a-Matic is the name of the car being designed by Bobby and his friends

Question

The Crush-a-Matic is the name of the car being designed by Bobby and his friends for the local destruction derby next spring. They plan on working on this project after work and on weekends between now and the event. Bobby’s friend Joe is the project planner and has come up with the following activities, times and sequences required to meet the deadline for the derby.

A. Determine the critical path for this project. (Do not submit your network diagram, just turn in the path letters. Example – W-T-V-Q)

B. Bobby’s car painting connection is finding that his shop is a little slower than expected and would be willing to cut the guys a deal if they can get the car ready for paint earlier. Joe reviewed the project plan and found that three tasks may be shortened by two days; these activities are E, B, and G. Which activities would you choose to shorten, and why?

C. Recalculate the project completion time given the suggestions in part b, what is the new project completion time in days?

ActivityDescription Immediate PredecessorNormal Time (days) A Start B Purchase Used Car C Design D Remove car interior completely E Rebuild transmission & drive train F Repair and tune engine G Install roll cage & driver's seat H Weld doors I Paint JFinal test 14 C, D 15 F, G

Explanation / Answer

a. critical path is- A-B-C-E-F-H-I-J,with duration of 71

b. activity E can be shortened by 2 days, because it is carrying 15 days in the given schedule, but activity B carries only 5 days. hence, activity E will be cut by 2 days, even 13 days will be sufficicent period for completion of the task.

c. if the project activity cut down by 2 days of activity E, there is no change in critical path and the project completion duration is 69 weeks

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