Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 15, Problem 22P
Summary Introduction
To determine:The probability that an ambulance can be available at a call.
Introduction:The probability that an element or system can happen as specified is termed as reliability of the system. The reliability of a system in combination is determined as reliability of its elements.
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Chapter 15 Solutions
Practical Operations Management
Ch. 15 - Prob. 1DQCh. 15 - Prob. 2DQCh. 15 - Prob. 3DQCh. 15 - Prob. 4DQCh. 15 - Prob. 5DQCh. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5P
Ch. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10PCh. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Prob. 17PCh. 15 - Prob. 18PCh. 15 - Prob. 19PCh. 15 - Prob. 20PCh. 15 - Prob. 21PCh. 15 - Prob. 22PCh. 15 - Prob. 23PCh. 15 - Prob. 24PCh. 15 - Prob. 25PCh. 15 - Prob. 1.1QCh. 15 - Prob. 1.2QCh. 15 - Prob. 1.3QCh. 15 - Prob. 3.1QCh. 15 - Prob. 3.2QCh. 15 - Prob. 3.3QCh. 15 - Prob. 3.4Q
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- The concept of reliability, in short, refers to the ability of a given system to operate in accordance with the purpose for which it was designed, within a stipulated period of time. Suppose you, Mechanical Engineer, have been hired to provide consultancy to a parts factory automotive. At one point in the conversation between you and your contractor, he stated that the company has a specific system that needs to undergo reliability optimization and made the following statement: “The system we want to optimize has a low reliability of 63%. We come to this conclusion because, in for every 100 manufactured components 63 fail.” Review the above conclusion and judge whether the contractor is right or wrong in the comment he made. Justify your answer, presenting valid arguments, based on the discipline. Please make it typeable as handwriting hinders understanding!arrow_forwardThe reliability of a hard-disk drive is typically described in terms of a quantity called mean time between failures (MTBF). Although this quantity is called a “time,” the MTBF actually is measured in drive-hours per failure. If a system contains 1,000 disk drives, each of which has a 750,000-hour MTBF, which of the following best describes how often a drive failure will occur in that disk farm: once per thousand years, once per century, once per decade, once per year, once per month, once per week, once per day, once per hour, once per minute, or once per second?arrow_forwardAn 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:arrow_forward
- 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.arrow_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_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
- Banks have card readers on the outside doors to individuals branches for access to the ATM lobby for off banking hours. In this example, a bank has decided to use two card readers hooked up in parallelredundancy where the customer can use either card reader to gain entry to the lobby. Assume that the percentage of failure for the card reader is 5%, find the overall system reliability, Rs .arrow_forwardA product design engineer must decide if a redundant component is cost justified in a certain system. The system in question has a critical component with a probability of 0.96 of operating. System failure would involve a cost of GH¢20,000. What is the probability that the system will fail? Probability of the system failing is Blank 1. Fill in the blank, read surrounding text.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
- Both alpha and beta are measures of reliability. Both alpha and beta are measures of reliability. True Falsearrow_forwardOne 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_forwardRick Wing, salesperson for Wave Soldering Systems, Inc. (WSSI), has provided you with a proposal for improving the temperature control on your present machine. The machine uses a hot-air knife to cleanly remove excess solder from printed circuit boards; this is a great concept, but the hot-air temperature control lacks reliability. According to Wing, engineers at WSSI have improved the reliability of the critical temperature controls. The new system still has the four sensitive integrated circuits controlling the temperature, but the new machine has a backup for each. The four integrated circuits have reliabilities of 0.84 0.86 0.88 and 0.90 The four backup circuits all have a reliability of 0.84 Part 2 a) The overall reliability of the new temperature controller = enter your response here% (enter your response as a percentage rounded to two decimal places).arrow_forward
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