Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
10th Edition
ISBN: 9780134181981
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Question
Chapter 17, Problem 21P
a)
Summary Introduction
To determine: The expected number of breakdowns per year.
b)
Summary Introduction
To determine: The cost of current maintenance policy.
c)
Summary Introduction
To determine: The most economical policy.
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The fire department has a number of failures with its oxygen masks and is evaluating the possibility of outsourcing preventive maintenance to the manufacturer. Because of the risk associated with a failure, the cost of each failure is estimated at $2,200. The current maintenance policy (with station employees performing maintenance) has yielded the following history:
Number of breakdowns
0
1
2
3
4
5
Number of years in which breakdowns occurred
5
3
1
4
6
2
a) The expected number of breakdowns per year with station employees performing maintenance = breakdowns per year (round your response to two decimal places).
DuLarge Marine manufactures diesel engines for shrimp trawlers and other small commercial boats. One of their automated machines has caused several problems. Over the past 30 weeks, the machine has broken down as indicated below. Each time the machine breaks down, the firm loses an average of $3,000 in time and repair expenses. If preventive maintenance were implemented, it is estimated that an average of only one breakdown per week would occur. The cost of preventive maintenance is $1,000 per week.
Number of breakdowns per week
0
1
2
3
4
Frequency (Number of weeks that breakdowns occurred)
8
3
5
9
5
What is the weekly total maintenance cost of this program?
Given the following data, find the expected breakdown cost. The cost per breakdown is $200.
Number of breakdowns per week
0
1
2
3
4
Weekly frequency
5
12
10
18
5
13) Great Southern Consultants Group's computer system has been down several times over the…
Chapter 17 Solutions
Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
Ch. 17 - Prob. 1EDCh. 17 - Prob. 1DQCh. 17 - Prob. 2DQCh. 17 - Prob. 3DQCh. 17 - Prob. 4DQCh. 17 - What is the trade-off between operator-performed...Ch. 17 - Prob. 6DQCh. 17 - Prob. 7DQCh. 17 - Prob. 8DQCh. 17 - Prob. 9DQ
Ch. 17 - Prob. 10DQCh. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - Prob. 3PCh. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - What is the reliability of the system shown?Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - Rick Wing, salesperson for Wave Soldering Systems,...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - What are the expected number of yearly breakdowns...Ch. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - Prob. 1CSCh. 17 - Prob. 2CSCh. 17 - Prob. 3CS
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- A plastic injection molding machine operates 334 days a year. It is the bottleneck workstation in a process that produces plastic housed wall clocks. Industrial engineers collected data on the probability of machine breakdowns, the costs of preventive maintenance, and the cost of a breakdown. Number of Molding Machine Breakdowns per Day Probability of a breakdown 0 0.32 1 0.27 2 0.22 3 0.13 4 0.06 The cost of preventive maintenance is high due to performing it between 1 and 4 a.m. each day by two machine experts. The preventive maintenance cost is $2,030 per day including replacement parts, cleaning, and software upgrades. The cost of a breakdown of $1,940 is also high because the downstream workstations can only work until all work-in-progress inventory is completed; then the entire process must stop. What are the economics of the situation? Do not round intermediate calculations. Round your answers to the nearest cent. The expected cost of a breakdown per day is $ The manufacturing…arrow_forwardThe annual operating costs of Machine A are $2,000. The machine will perform satisfactorily over the next five years and has an estimated market value (MV) of $3,000 at the end of its useful life. A salesperson for another company is offering a replacement, Machine B, for $14,000, with a MV of $1,400 after five years. Annual operating costs for Machine B will only be $1,500. It is believed that $10,000 could be obtained for the old machine A if it were sold now. If the before-tax MARR is 10% per year, determine whether the old machine A should be replaced by the new machine B.arrow_forwardMachine A was purchased last year for $20,000 and had an estimated market value of $2,000 at the end of its 6-year useful life. Annual operating costs are $2,000. The machine will perform satisfactorily over the next 5 years. A salesperson for another company is offering a replacement, machine B , for $14,000 with a market value of $1,400 after 5 years. Annual operating costs for machine B will only be $1,400. A trade-in allowance of $10,400 has been offered for machine A. If the MARR is 12% per year, should you buy the new machine? Use RORAI method. Write a breif interpretation of your answer.arrow_forward
- Aurora Electronics has received a large number of customer complaints and returns for a DVD player that it manufactures. When a DVD is inserted into the loading mechanism, it can become stuck and difficult to remove. Consumers will attempt to pull out the DVD drawer with their fingers or pry it open with an object such as a knife, pencil, or screwdriver, frequently damaging the DVD or injuring themselves. What are the various costs of poor quality and quality assurance that may be associated with this quality issue?arrow_forwardCEO John Spychalski is concerned about a problem that has existed at CBN railroad for almost 20 years now. The continuous problem has been that the locomotives used by the company are not very reliable. Even with prior decisions to resolve the problem, there still has not been a change in the reliability of these locomotives. Between 2015 and 2016, 155 new locomotives were purchased and one of CBN’s repair shops was renovated. The renovated shop has been very inefficient. Spychalski estimated that the shop would complete 300 overhauls on a yearly basis, but instead it has only managed to complete an average of160 overhauls per year.The company has also been doing a poor job servicing customers (that is, providing equipment). CBN has averaged only 87–88 percent equipment availability, compared to other railroads with availability figures greater than 90 percent. Increased business in the rail industry has been a reason for trying to reduce the time used for repairing the locomotives.…arrow_forwardThe fire department has a number of failures with its oxygen masks and is evaluating the possibility of outsourcing preventive maintenance to the manufacturer. Because of the risk associated with a failure, the cost of each failure is estimated at $2,200. The current maintenance policy (with station employees performing maintenance) has yielded the following history: Number of breakdowns 0 1 Number of years in which breakdowns occurred 3 3 4 5 3 10 1 b) The cost of the current maintenance policy = 2 3 1 a) The expected number of breakdowns per year with station employees performing maintenance = breakdowns per year (round your response to two decimal places).arrow_forward
- Telephone poles, once installed in a location, remain in useful service until one of a variety of events occur. (a) Name three reasons why a telephone pole might be removed from useful service at a particular location. (b) You are to estimate the total useful life of telephone poles. If the pole is removed from an original location while it is still serviceable, it will be installed elsewhere. Estimate the optimistic life, most likely life, and pessimistic life for telephone poles. What percentage of all telephone poles would you expect to have a total useful life greater than your estimated optimistic life? (c) What is an environmental life cycle assessment (LCA)? How do treated wood, metal, and concrete poles compare?arrow_forwardDescribe the key components of a Failure Modes and Effects Analysis (FMEA) and how it is used to improve system reliability.arrow_forwardAn office security system at PAC Ltd has two component parts, both of which must work for the system to function. Part 1 has a reliability of 80 percent, and part 2 has a reliability of 98 percent. Compute the reliability of the system.arrow_forward
- In a car manufacturing company, an automated painting process has been introduced, and the quality assurance team suspects there might be issues that require investigation. The team decides to conduct a root cause analysis to identify potential problems. Through the root cause analysis and further investigation, it appears that the drying time of the paint in minutes is affecting the overall quality of the finish. The aspect they need to examine is the variation in drying time across different colours of paint. Considering the ongoing concerns in the painting process, the team chooses to collect a sample of six drying time measurements every 20 minutes from various colours of paint. The recorded drying time values for a day's production are presented in Table 1. A total of 10 sets of measurements, each consisting of six drying time values in minutes, have been collected. Each time a set of measurements is taken, the individual drying time values are recorded. Table 1: Drying Time…arrow_forwardStatement of the Problem and Solutions Rollin King and Herb Kelleher started Southwest Airlines in 1971 with this idea: if they could take airline passengers where they want to go, on time, at the lowest possible price, and have a good time while doing it, people would love to fly their airline. The result? No other airline in the industry's history has enjoyed the customer loyalty and extended profitability for which Southwest is now famous. The company now flies more than 3,400 times each day to over 64 destinations across the United States There's more to the story, however, than making promises and hoping to fulfill them. A large part of Southwest Airlines' success lies in its ability to plan long-term capacity to better match demand, as also improving the utilization of its fleet by turning around an aircraft at the gate faster than its competitors. Capacity at Southwest is measured in seat miles, and even a single minute reduction in aircraft turnaround time system wide means…arrow_forwardA city is spending $20 million on a new sewage system. The expected life of the system is 40 years, and it will have no market value at the end of its life. Operating and maintenance expenses for the system are projected to average $0.6 million per year. If the city’s MARR is 8% per year, what is the capitalized worth of the system? The study period is 100 years.arrow_forward
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