Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780134111056
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter 4, Problem 7P
Macon Controls produces three different types of control units used to protect industrial equipment from overheating. Each of these Linus must be processed by a machine that Macon considers to be their process bottle neck. The plant operates on two 8-hour shifts, 5 days per week, 52 weeks per year. Table 4.2 provides the time standards at the bottleneck, lot sizes, and demand
- How many machines are required to meet minimum (pessimistic) demand, expected demand, and maximum (optimistic) demand?
- How many machines are required if the operations manager decides to double lot sizes?
- If the operations manager has three machines and believes that the plant can reduce setup time by 20 percent through process improvement initiatives, does that plant have adequate capacity to meet all demand scenarios without increasing lot sizes?
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A manager must decide which type of machine to buy, A, B, or C. Machines costs are as follows:
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Cost
A
$40,000
B
$30,000
C
$80,000
Product forecast, processing times on the machines, and setup times are as follows:
Processing Time Per Unit (minutes)
Product
Annual Demand
A
B
C
Setup Times (minutes)
Production Lots (units)
1
16,000
3
4
2
20
200
2
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5
3
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100
3
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5
6
3
60
50
4
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2
4
1
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Machines operate 10 hours a day, 250 days a year. The manager wants to have a capacity cushion of 10%.
a. Assume that only purchasing costs are being considered. Which machines would have the lowest total cost, and how many of that machines would be needed?
b. Consider this additional information: The machines differ in terms of hourly operating costs: The A machines have an hourly operating cost of $11 each, B machines have an hourly operating cost of $10 each, and C machines have an hourly operating cost of $12 each. Which alternative would…
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Chapter 4 Solutions
Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (11th Edition)
Ch. 4 - Prob. 1DQCh. 4 - Prob. 2DQCh. 4 - The Dahlia Medical Center has 30 labor rooms, 15...Ch. 4 - A process currently services an average of 50...Ch. 4 - An airline company must plan its fleet capacity...Ch. 4 - Food Goblin Supermarkets use both cashiers and...Ch. 4 - Returning to Problem 4, under both assumption of...Ch. 4 - Purple Swift manufactures birdhouses in lots of...Ch. 4 - Macon Controls produces three different types of...Ch. 4 - Up, Up, and Away is a producer of kites and wind...
Ch. 4 - Tuff-Rider, Inc. manufactures touring bikes and...Ch. 4 - Arabelle is considering expanding the floor area...Ch. 4 - The Astro World amusement park has the opportunity...Ch. 4 - Kim Epson operates a full-service car wash, which...Ch. 4 - MKM International is seeking to purchase a new CNC...Ch. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - Dawson Electronics is a manufacturer of high-tech...Ch. 4 - A manager is trying to decide whether to buy one...Ch. 4 - Acme Steel Fabricators experienced booming...Ch. 4 - Referring to Problem 7, the operations manager at...Ch. 4 - Darren Mack owns the Gas n’ Go convenience store...Ch. 4 - Prob. 25PCh. 4 - Prob. 1VCCh. 4 - Prob. 2VCCh. 4 - How does Southwest Airlines know they are...Ch. 4 - Prob. 4VCCh. 4 - Prob. 1CCh. 4 - Prob. 2CCh. 4 - Prob. 3C
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