Twelve identical products were put on test for 90 days, by which time 8 had failed at
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Question:
Twelve identical products were put on test for 90 days, by which time 8 had failed at 31, 35, 39, 48, 53, 59, 66 and 75 days whilst the remaining 4 were still fully functional when the test was ended. Assuming constant failure rate,
1) Calculate the MTTF of the product;
2) Estimate its reliability at 60 days;
3) Comment on whether the assumption of constant failure rate is justified.
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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