EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
10th Edition
ISBN: 9780134183848
Author: HEIZER
Publisher: PEARSON CO
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Question
Chapter 17, Problem 5P
a)
Summary Introduction
To determine: The percent of failues.
b)
Summary Introduction
To determine: The number of failures per unit hour.
c)
Summary Introduction
To determine: The mean time between failures at this point in testing.
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A manufacturer of disk drives for notebook computers wants an MTBF of at least 45,000 hours. Recent test
results for 10 units were one failure at 10,000 hours, another
at 25,000 hours, and two more at 45,000 hours. The remaining
units were still running at 50,000 hours. Determine the following:
a) Percent of failures
b) Number of failures per unit-hour
c) MTBF at this point in the testing
Which errors manifest most often during performance testing?
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.
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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- What are typical performance testing errors?arrow_forwardtions Management Spring21 Reliability can be considered a dimension of either product or service quality. a. TRUE b. FALSEarrow_forwardA manufacturer of disk drives for notebook computerswants an MTBF of at least 50,000 hours. Recent test results for10 units were one failure at 10,000 hours, another at 25,000 hours,arrow_forward
- Rick 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_forwardThe Beta II computer's electronic processing unitcontains 50 components in series. The average reliability of eachcomponent is 99.0%. Using F igure 17.2, determine the overallreliability of the processing unitarrow_forward-----R1------ -R2-----R3-- For the parallel production process shown above, Upper R 1 =0.92 Upper R 2 =0.90 Upper R3 =0.98 For the given parallel production process, the reliability = ?arrow_forward
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