A manufacturer of household kettles subjected 50 kettles to 10 000 hours of testing. Test results for the 50 kettles show that there were two failures at 3500 hours, two failures at 4800 hours, one failure at 8600 hours, and two more failures at 9000 hours. 4.1.1 Calculate the failure rate percentage (FR %). 4.1.2 Calculate the number of failures per unit-hour (FR N). 4.1.3 Calculate the MTBF at this point in testing.
A manufacturer of household kettles subjected 50 kettles to 10 000 hours of testing. Test results for the 50 kettles show that there were two failures at 3500 hours, two failures at 4800 hours, one failure at 8600 hours, and two more failures at 9000 hours. 4.1.1 Calculate the failure rate percentage (FR %). 4.1.2 Calculate the number of failures per unit-hour (FR N). 4.1.3 Calculate the MTBF at this point in testing.
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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A manufacturer of household kettles subjected 50 kettles to 10 000 hours of testing. Test results for the 50 kettles show that there were two failures at 3500 hours, two failures at 4800 hours, one failure at 8600 hours, and two more failures at 9000 hours.
4.1.1 Calculate the failure rate percentage (FR %).
4.1.2 Calculate the number of failures per unit-hour (FR N).
4.1.3 Calculate the MTBF at this point in testing.
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