A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place).
A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place).
Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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Hi, I need help solving for part C of this Operations Management problem. Thank you!
Transcribed Image Text:A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours.
The remaining units were still running at 60,000 hours.
Determine the following:
a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place).
b) Number of failures per unit-hour of operating time=0.00001190 failures per hour (round your response to eight decimal places).
c) MTBF at this time in testing = hours (round your response to the nearest whole number).
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