By Wayne B. Nelson
This useful source presents modern, statistical equipment for speeded up trying out together with try out versions, analyses of information, and plans for trying out. every one subject is self-contained for simple reference. insurance is vast and specific adequate to function a textual content or reference. this useful publication good points actual attempt examples in addition to information analyses, machine courses, and references to the literature.
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Additional resources for Accelerated Testing: Statistical Models, Test Plans, and Data Analysis 1st edition (Wiley Series in Probability and Statistics)
Also, analyze pilot or simulated data. This is a check that the planned analyses of the final data will yield the desired information accurately enough. Of course, the actual data may suggest other useful analyses. Section 6 gives an overview of the statistical aspects of such data analyses. 5. COMMON ACCELERATED TESTS This background section briefly describes some common accelerated tests: elephant tests, environmental stress screening, a single test condition, a number of test conditions, and burn-in.
Many reliability applications require an estimate of a failure rate, percentage failing on warranty, typical life, etc. Elephant tests do not provide quantitative reliability information. This is a consequence of the few specimens. 3). 2. Environmental Stress Screening ESS. This section briefly surveys Environmental Stress Screening. Environmental stress screening involves accelerated testing of products under a combination of random vibration and thermal cycling and shock - shake and bake. It has two major purposes.
In metal fatigue tests, usually a specimen undergoes (nearly) sinusoidal loading. But the sinusoid need not have a mean stress of zero. 4 shows such a sinusoid with a positive mean. Tensile stress is positive, and compressive stress is negative in the figure. Thus, according to the figure, the specimen is under tension for most of a cycle and under compression for a small part of a cycle. Such sinusoidal loading is characterized by two numbers, say, the stress range and the mean stress. Frequency often has negligible effect.
Accelerated Testing: Statistical Models, Test Plans, and Data Analysis 1st edition (Wiley Series in Probability and Statistics) by Wayne B. Nelson