Download PDF by Wayne B. Nelson: Accelerated Testing: Statistical Models, Test Plans, and

By Wayne B. Nelson

ISBN-10: 0470316799

ISBN-13: 9780470316795

This is often unquestionably the simplest ebook in quantitative speeded up existence trying out. Dr.Nelson does a good task in sincerely explaining the statistical versions and the lifestyles facts research recommendations relating to sped up checking out. I cant ponder the other e-book that comes even with regards to this paintings. an exceptional reference for a person attracted to speeded up trying out.

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Read Online or Download Accelerated Testing: Statistical Models, Test Plans, and Data Analysis (Wiley Series in Probability and Statistics) PDF

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Additional info for Accelerated Testing: Statistical Models, Test Plans, and Data Analysis (Wiley Series in Probability and Statistics)

Example text

Like cyclic stress tests, random stress models employ some characteristics of the stress distribution as stress variables (say, the mean, standard deviation, correlation function, and power spectral density). Then such a test is regarded as a constant stress test; this, of course, is simplistic but useful. 1 where the horizontal line shows the mean stress. Moreover, specimen life is modeled with a constant stress model, and the data are analyzed accordingly. Such life data may be censored. 4. ENGINEERING CONSIDERATIONS Many considerations impact the validity and accuracy of information from an accelerated test.

Third, data analyses for reliability estimation are well developed and computerized. Chapter 6 presents test plans for constant stress tests. Such plans consist of the “best” test stress levels and number of specimens at each level. Step stress. In step-stress loading, a specimen is subjected to successively higher levels of stress. A specimen is first subjected to a specified constant stress for a specified length of time. If it does not fail, it is subjected to a higher stress level for a specified time.

If the cable specimen survives, the new design qualifies for use. MIL-STD-883Cdescribes such tests for qualifying microelectronics. Purposes. In design and manufacturing development work, elephant tests reveal failure modes. Engineers then change the product or manufacturing process to overcome such failures. This important use of elephant testing is a standard engineering practice that often improves a product. It sometimes does not, as shown below by the TV transformer example. For quality control, elephant testing of samples from production can reveal product changes.

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Accelerated Testing: Statistical Models, Test Plans, and Data Analysis (Wiley Series in Probability and Statistics) by Wayne B. Nelson

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