Read e-book online Accelerated Testing: Statistical Models, Test Plans, and PDF

By Wayne B. Nelson

ISBN-10: 0470316799

ISBN-13: 9780470316795

This is often absolutely the easiest publication in quantitative speeded up existence trying out. Dr.Nelson does an outstanding activity in truly explaining the statistical versions and the lifestyles facts research ideas concerning sped up trying out. I cant ponder the other booklet that comes even just about this paintings. an excellent reference for a person attracted to sped up trying out.

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

Sample text

That is, there may not be a cause and effect relationship between life and the covariate. Instead, there may be a more basic variable that simultaneously affects the covariate and life. ” When there is a cause and effect relationship, the covariate can be used to control life. Binder content above is such a covariate. When there is no cause and effect relationship but just statistical correlation, the covariate can be used topredict life but not to control it. Production shift below is such a covariate.

An unfailed specimen has its age shown by an arrow. At the highest level, all four specimens ran to failure. At the middle level, four ran to failure, and one was unfailed. At the lowest level, four ran to failure, and four were unfailed. In use, most products run at constant stress. Then a constant stress test mimics actual use. Moreover, such testing is simple and has advantages. First, in most tests, it is easier to maintain a constant stress level. Second, accelerated test models for constant stress are better developed and empirically verified for some materials and products.

Modern electric coffee makers heat water by passing it through heated tubing. In use, mineral build-up inside the tubing constricts the opening. This build-up gradually increases the time to make a pot of coffee. Engineers developed an accelerated test to study this problem - the sludge test. It was used to compare tubing designs, including competitors’ designs. The test involved repeatedly running a coffee maker with a mineral-rich slurry that quickly produced build-up. By definition, a coffee maker “failed” on the first pot that took longer than 20 minutes.

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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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Read e-book online Accelerated Testing: Statistical Models, Test Plans, and PDF
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