Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
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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
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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- A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 15 units were one failure at 12,000 hours, one at 20,000 hours, and one more at 48,000 hours. The remaining units were still running at 60,000 hours. Determine the following: Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).arrow_forwardEven 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_forwardClassify each of the following as either a Type I error or a Type II error:b. Releasing a guilty person from jailarrow_forward
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