Reconsider Prob. 10.5-4 involving the Good Homes Construction Co. project to construct a large new home. Michael Dean now has generated the plan for how to crash this project (as given as an answer in the back of the book). Since this plan causes all three paths through the project network to be critical paths, the earliest start time for each activity also is its latest start time.

Michael has decided to use PERT/Cost to schedule and control project costs.

(a) Find the earliest start time for each activity and the earliest finish time for the completion of the project.

(b) Construct a table like Table 10.10 to show the budget for this project.

(c) Construct a table like Fig. 10.15 (by hand) to show the schedule of costs based on earliest times for each of the 8 weeks of the project.

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(d) Now use the corresponding Excel template in your OR Courseware to do parts

(b) and

(c) on a single spreadsheet.

(e) After 4 weeks, activity A has been completed (with an actual cost of $65,000), and activity B has just now been completed

(with an actual cost of $55,000), but activity C is just 33 percent completed (with an actual cost to date of $44,000). Construct a PERT/Cost report after week 4. Where should Michael concentrate his efforts to improve cost performances?