EBK PRINCIPLES OF OPERATIONS MANAGEMENT
10th Edition
ISBN: 8220102744059
Author: HEIZER
Publisher: PEARSON
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Chapter 17, Problem 15P
Summary Introduction
To determine: The reliability of the system.
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A typical retail transaction consists of several smaller steps, which can be considered components subject to failure. A list of such components might include: Let the eight probabilities of success be .92, .94, .99, .99, .98, .97,.95, and .96. What is the reliability of the system; that is, the probabilitythat there will be a satisfied customer? If you were the storemanager, what do you think should be an acceptable value forthis probability? Which components would be good candidatesfor backup, which for redesign?
An early warning security fence has three major components each must perform in order for the system to perform. Their reliabilities are .4, .3, and .2. The system reliability is equal to:
Due to the extreme cost of interrupting production, a firm has two standby machines available in case a particular machine breaks down. The machine in use has a reliability of .94, and the backups have reliabilities of .90 and .80. In the event of a failure, either backup can be pressed into service. If one fails, the other backup can be used. Compute the system reliability.
Chapter 17 Solutions
EBK PRINCIPLES OF OPERATIONS MANAGEMENT
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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- At the beginning of each week, a machine is in one of four conditions: 1 = excellent; 2 = good; 3 = average; 4 = bad. The weekly revenue earned by a machine in state 1, 2, 3, or 4 is 100, 90, 50, or 10, respectively. After observing the condition of the machine at the beginning of the week, the company has the option, for a cost of 200, of instantaneously replacing the machine with an excellent machine. The quality of the machine deteriorates over time, as shown in the file P10 41.xlsx. Four maintenance policies are under consideration: Policy 1: Never replace a machine. Policy 2: Immediately replace a bad machine. Policy 3: Immediately replace a bad or average machine. Policy 4: Immediately replace a bad, average, or good machine. Simulate each of these policies for 50 weeks (using at least 250 iterations each) to determine the policy that maximizes expected weekly profit. Assume that the machine at the beginning of week 1 is excellent.arrow_forward0.855 1((1-0.645)x(1-0.800)) = 0.0710 1-0.0710 = 0.929 0.929 0.999 0.855 x 0.929 x 0.999 = 0.7935 Reliability of the system is 0.7935arrow_forwardCAN YOU PROVIDE THIS IN EXCEL, I CANT FIGURE OUT HOW TO DO THE EQUATIONS IN EXCEL. One of the industrial robots designed by a leading producer of servomechanisms has four major components. Components’ reliabilities are .98, .95, .94, and .90. All of the components must function in order for the robot to operate effectively.a. Compute the reliability of the robot.b. Designers want to improve the reliability by adding a backup component. Due to space limitations, only one backup can be added. The backup for any component will have the same reliability as the unit for which it is the backup. Which component should get the backup in orderto achieve the highest reliability?c. If one backup with a reliability of .92 can be added to any one of the main components, which component should get it to obtain the highest overall reliability?arrow_forward
- 2. An electronic device has three components. Those components are in series, so the failure of one causes the failure of the device. The reliability (probability that there is no fault) the device can be improved by installing one or two drives reserve in each component. The following table shows the reliability r and the cost c (see image). The capital available for the manufacture of the device is $10,000. How should the device be manufactured? Make the formulation in dynamic programming of the problem. Hint: The objective is to maximize reliability, that is, the function is multiplicative, not additive.arrow_forwardTopford supplies X-Data DVDs in lots of 50, and they have a reported defect rate of 0.5% so the probability of a disk being defective is 0.005. It follows that the probability of a disk being good is 0.995. What is the probability of getting at least one defective disk in a lot of 50? Group of answer choices None of the above 0.0562 Approximately 0 0.0246arrow_forwardOne of the industrial robots designed by a leading producer of servomechanisms has four major components. Component 0.98, 0.95, 0.94, and 0.90. All of the components must function in order for the robot to operate effectively. b. Designers want to improve the reliability by adding a backup component. Due to space limitations, only one backup cbackup for any component will have the same reliability as the unit for which it is the backup. Compute the reliability of the robot.arrow_forward
- The following is an excerpt from a conversation between two sales clerks, Tracy Rawlin and Jeff Weimer. Both Tracy and Jeff are employed by Magnum Electronics, a locally owned and operated electronics retail store. Suggest appropriate control procedures that would have prevented or detected the theft of cash.arrow_forwardDetermine the reliability of the complex system shown if the failure rate of each component is 0.02.arrow_forwardA recent engineering change at Sullivan Wrist Calculator places a backup component in each of the two least reliable transistorcircuits. The new circuits will look like the following: R2 R3 R4 R5 .90 .95 .98 .90 .99R1.90 .90 What is the reliability of the new system?arrow_forward
- A bank loan processing system has three components withindividual reliabilities as shown:R1 = 0.90 ---> R2 = 0.89 ---> R3 = 0.95What is the reliability of the bank loan processing system?arrow_forwardOne of the solar instruments on a satellite has three major parts, all of which must operate. Two have reliabilities of .7 and the other has a reliability of .9. In case the system fails, there is an identical backup system that kicks on automatically. The overall reliability of the system, including the backup, is closest to:arrow_forwardConsider an expensive part with a reliability of 89.8%. If the part failed is will cost the firm $4200. On each part, a backup can be installed that costs $280. What is the minimum allowable reliability for the backup that would make installing it worthwhile?arrow_forward
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