Abstract

The present rules for stating reliability information are only partly standardized. At the moment most people use the exponential failure law to estimate the rate at which failures will occur in the future for a product population, knowing the number of failures which occurred during tests upon a sample from that population. Comparisons between products based upon such data can be misleading. While use of the Wiebull method is an excellent way of discriminating between the reliability of two or more product populations, this method demands complete details of the sampling life tests, which the would-be user may not have. The author offers a method by which the user can approach the Wiebull accuracy if detailed results of the sampling tests are not available.

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