Assignment 1 Project Management 3.7 Task time estimates for a production line setup project at Robert Klassen's Ontario factory are as follows: Immediate Predecessors Activity A B D E F G Time (in hours) 6.0 7.2 5.0 6.0 4.5 7.7 4.0 A B.C B,C D E, F a) Draw the project network using AON. b) Identify the critical path. c) What is the expected project length? d) Draw a Gantt chart for the project. P 3.14 McGee Carpet and Trim installs carpet in commercial offices, Andrea McGee has been very concerned with the amount of time it took to complete several recent jobs. Some of her workers are very unreliable. A list of activities and their optimistic comple- tion time, the most likely completion time, and the pessimistic com- pletion time (all in days) for a new contract are given in the following table: Time (days) Immediate Predecessor(s) a 6 4 2 8 4 3 Activity B D E F G H 1 WONEN 14 BD A, E AE F G H. 1 10 14 2 9 12 20 10 X 8 a) Determine the expected completion time and variance for each activity b) Determine the total project completion time and the critical path for the project. c) Determine ES, EF, LS, LF, and slack for each activity. d) What is the probability that McGee Carpet and Trim will finish the project in 40 days or less? Capacity Planning 87.15 A production process at Kenneth Day Manufacturing is shown in Figure 57.9. The drilling operation occurs separately from, and simultaneously with the sawing and sanding operations. Assembly Sewing Sanding 0.7 units.hr 6 units 6 units welding Assembly 2 untuhr 0.7 units the Drilling Assembly 2.4 units 0.7 units A FIGURE 87.9 A product needs to go through only one of the three assembly oper- ations (the operations are in parallel). a) Which operation is the bottleneck? b) What is the process time of the overall system? c) What is the process cycle time of the overall system? d) If the firm operates 8 hours per day, 20 days per month, what is the monthly capacity of the manufacturing process? .. 4.5 The Carbondale Hospital is considering the purchase of a new ambulance. The decision will rest partly on the anticipated mileage to be driven next year. The miles driven during the past 5 years are as follows: Year 1 2 3 Mileage 3,000 4,000 3,400 3,800 3,700 5 a) Forecast the mileage for next year using a 2-year moving aver- age. b) Find the MAD based on the 2-year moving average forecast in part (a). (Hint: You will have only 3 years of matched data.) c) Use a weighted 2-year moving average with weights of 4 and 6 to forecast next year's mileage. (The weight of .6 is for the most recent year.) What MAD results from using this approach to forecasting? (Hint: You will have only 3 years of matched data.) d) Compute the forecast for year 6 using exponential smoothing, an initial forecast for year 1 of 3,000 miles, and a ... Pix