Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
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Chapter 17, Problem 3P
Summary Introduction
To determine: The level of reliability that is required.
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A serial system is assembled in house from 20 parts. To be successful in the marketplace the system has to have three sigma reliability. What level of reliability of each part is necessary to achieve that level of the overall performance?
A new aircraft control system is being designed that must be 98.5% reliable. This system consists of four components in series.
If all four of the components are to have the same level of reliability, then the level of reliability required for each component = 99.50
percentage rounded to two decimal places).
% (enter your response as a
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!
Chapter 17 Solutions
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 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - What are the expected number of yearly breakdowns...Ch. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - Prob. 22PCh. 17 - Prob. 1VCCh. 17 - Prob. 2VCCh. 17 - Prob. 3VC
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- What is the relationship between system reliability and system maintenance? How can proactive maintenance practices improve reliability?arrow_forwardYou have a system composed of a serial connection of four components with the following reliabilities: What is the reliability of the system?arrow_forwardIn the context of system reliability, explain the terms Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR). How are these metrics used in assessing and improving system reliability?arrow_forward
- Explain the terms MTTF (Mean Time To Failure) and MTTR (Mean Time To Repair) in the context of reliability.arrow_forwardA system consisting of two identical components A& B. (a) Under what conditions does the system fail? (b) Ifthe reliability (i.e. the ability of the system to perform itsintended function satisfactorily) of components A & B are90% and 80%, respectively, under what conditions does thesystem fail?arrow_forwardIf the backup computer must be activated by a switch in the event that the first computer fails, and the switch has a reliability of .98, what is the overall reliability of the system? (Both the switch and the backup computer must function in order for the backup to take over.)arrow_forward
- Reliability metrics includes: Select one: a. Probability of failure on demand, Rate of occurrence of failures/Mean time to failure, and Availability b. Probability of failure on demand c. Availability d. Rate of occurrence of failures/Mean time to failurearrow_forwardA product is composed of a series connection of four components with the following reliabilities. What is the reliability of the system? Component 1 2 3 4 Reliability .90 .95 .97 .88 A system has four components in a series. What is the reliability of the system? Component 1 2 3 4 Reliability .90 .95 .90 .99arrow_forwardWhat are the primary factors that can decrease system reliability?arrow_forward
- Assume that the system still costs $600 to fix every time it breaks down, and you are going to run the system 1000 times. You are considering improving your system. You have contacted a backup supplier of component 1. She tells you that the backup for component 1 will cost $50,000. What would the minimum reliability of the backup need to be to make the purchase worthwhile? (keep 4 decimals for intermediate calculations)arrow_forwardRick Wing, salesperson for Wave Soldering Systems,Inc. (WSSI), has provided you with a proposal for improving thetemperature control on your present machine. The machine uses ahot-air knife to cleanly remove excess solder from printed circuit boards; this is a great concept, but the hot-air temperature con-trol 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 control-ling the temperature, but the new machine has a backup for each. The four integrated circuits have reliabilities of .90, .92, .94, and.96. The four backup circuits all have a reliability of .90.a) What is the reliability of the new temperature controller?b) If you pay a premium, Wing says he can improve all four of thebackup units to .93. What is the reliability of this option?arrow_forwardA Web server has five major components that must all function in order for it to operate as intended. Assuming that each component of the system has the same reliability, what is the minimum reliability each one must have in order for the overall system to have a reliability of .98?arrow_forward
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