EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
10th Edition
ISBN: 9780134183848
Author: HEIZER
Publisher: PEARSON CO
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Chapter 17, Problem 20P
Summary Introduction
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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 failure
Robert Klassan Manufacturing, a medical equipment manufacturer, subjected 90 heart pacemakers to 4,000 hours of testing. Halfway through the testing, 6 pacemakers failed.
The failure rate in terms of: Percent of Failure is Confirmed by my Professor to be 6.7%
Number of Failures per unit-hour is Confirmed by my Professor to be 0.00001724 failures per hour
Can you show me how my professor got these answers?
Also what is the Number of Failures per unit year = ? Failures per year (round your response to four decimal places. I know that the answer is Not 3. My professor said the answer wasn't that simple.
Explain why a product or system might have an overall reliability that is low even though it is com- prised of components that have fairly high reliabilities.
Chapter 17 Solutions
EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Rick Wing, salesperson for Wave SolderingSystems, Inc. (WSSI), has provided you with a proposal forimproving 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, butthe hot-air temperature control lacks reliability. According toWing, engineers at WSSI have improved the reliability of thecritical temperature controls. The new system still has the foursensitive integrated circuits controlling the temperature, butthe new machine has a backup for each. The four integratedcircuits have reliabilities of .90, .92, .94, and .96. The fourbackup 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 fourof the backup units to .93. What is the reliability of thisoption?arrow_forwardA 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?arrow_forwardWhich errors manifest most often during performance testing?arrow_forward
- An operation consists of two steps , the first of which has a reliability of 97% and the second a reliability of 99%. What is the probability that the operation will fail? please I need full explanationarrow_forwardA lathe machine worked 10 hours on a shift for 150 days. During this period, 3 failures occurred. The maintenance operators spent 4 hours, 3.5 hours, and 6 hours respectively, to repair each of these failures. a) What is the Mean Time Between Failure (MTBF) for the lathe machine? b) What is the Mean Time to Repair (MTTR) for the lathe machine? c) What is the Failure Rate? d) What is System Availability?arrow_forwardExplain the notion of "infant mortality" in the context ofproduct reliability.arrow_forward
- Even after taking all appropriate steps to produce a high integrity system, some remaining faults will remain. How would you ensure system safety and reliability in practical approaches?arrow_forwardWhat happens when the mean time between failures (MTTR) approaches zero? Is this a situation that can be adequately described?arrow_forwardDiscuss the concept of Mean Time Between Failures (MTBF) and how it is calculated. Explain its limitations and alternatives for measuring system reliability.arrow_forward
- Reliability can be considered a dimension of either product or service quality. Select one: O a. TRUE O b. FALSEarrow_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_forwardHow does preventive maintenance differ from predictive maintenance in ensuring system reliability?arrow_forward
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