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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

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

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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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
Transcribed Image Text: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
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