Operations Management (Comp. Instructor's Edition)
13th Edition
ISBN: 9781259948237
Author: Stevenson
Publisher: MCG
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Chapter 11, Problem 10P
Refer to Solved Problem 1. Prepare two additional aggregate plans. Call the one in the solved problem plan A. For plan B, hire one more worker at a cost of $200. Make up any shortfall using subcontracting at $8 per unit, with a maximum of 20 units per period (i.e., use subcontracting to reduce back orders when the
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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
Mileage
1
3,000
2
3
4
4,000
3,450
3,850
5
3,800
a) Using a 2-year moving average, the forecast for year 6 =
miles (round your response to the nearest whole number).
b) If a 2-year moving average is used to make the forecast, the MAD based on this = miles (round your response to one decimal place). (Hint: You will have only 3 years of matched data.)
c) The forecast for year 6 using a weighted 2-year moving average with weights of 0.40 and 0.60 (the weight of 0.60 is for the most recent period) = ☐ miles (round your response to the nearest whole number).
miles (round your response to one decimal place). (Hint: You will have only 3 years of
The MAD for the forecast developed using a weighted 2-year moving average with weights of 0.40 and 0.60 =
matched data.)
d) Using…
Task time estimates for the modification of an assembly line at Jim Goodale's Carbondale, Illinois, factory
are as follows:
B
D
G
Time
Activity
(in hours) Immediate Predecessor(s)
A
5.0
B
7.5
C
5.0
A
DEFC
8.0
B, C
4.5
Figure 2
A
B, C
7.7
D
G
5.0
E, F
This exercise contains only part a.
a) The correct precedence diagram for the project is shown in
目
F
B
Figure 3
A
E
B
E
☑
D
F
Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time
and the critical path should also be determined. Here are the activity times:
Activity Time (weeks) Immediate Predecessor(s) Activity Time (weeks) Immediate Predecessor(s)
A
6
E
3
B
B
8
F
6
B
C
3
A
G
11
C, E
D
1
A
H
7
D, F
Dave's earliest start (ES) and earliest finish (EF) are:
Activity
ES
.EF
A
0
6
B
0
8
C
3
9
D
6
E
F
8
G
22
H
21
Dave's latest start (LS) and latest finish (LF) are:
Activity
LS
LF
H
15
G
11
F
9
Chapter 11 Solutions
Operations Management (Comp. Instructor's Edition)
Ch. 11 - What three levels of planning involve operations...Ch. 11 - What are the three phases of intermediate...Ch. 11 - Prob. 3DRQCh. 11 - Why is there a need for aggregate planning?Ch. 11 - What are the most common decision variables for...Ch. 11 - Prob. 6DRQCh. 11 - Briefly discuss the advantages and disadvantages...Ch. 11 - What are the primary advantages and limitations of...Ch. 11 - Briefly describe the planning techniques listed as...Ch. 11 - What are the inputs to master scheduling? What are...
Ch. 11 - Prob. 11DRQCh. 11 - What general trade-offs are involved in master...Ch. 11 - Who needs to interface with the master schedule...Ch. 11 - How has technology had an impact on master...Ch. 11 - Service operations often face more difficulty in...Ch. 11 - Name several behaviors related to aggregate...Ch. 11 - Compute the total cost for each aggregate plan...Ch. 11 - A manager would like to know the total cost of a...Ch. 11 - Determine the total cost for this plan given the...Ch. 11 - a. Given the following forecast and steady regular...Ch. 11 - Manager T. C. Downs of Plum Engines, a producer of...Ch. 11 - Manager Chris Channing of Fabric Mills, Inc., has...Ch. 11 - SummerFun. Inc., produces a variety of recreation...Ch. 11 - Nowjuice, Inc., produces Shakewell fruit juice. A...Ch. 11 - Wormwood, Ltd., produces a variety of furniture...Ch. 11 - Refer to Solved Problem 1. Prepare two additional...Ch. 11 - Refer to Solved Problem 1. Suppose another option...Ch. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Refer to Example 3. Suppose that regular-time...Ch. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prepare a master production schedule for...Ch. 11 - Update the master schedule shown in Figure 11.11...Ch. 11 - Prepare a master schedule like that shown in...Ch. 11 - Determine the available-to-promise (ATP)...Ch. 11 - Prepare a schedule like that shown in Figure 11.12...Ch. 11 - The objective is to choose the plan that has the...Ch. 11 - Prob. 2CQ
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