Failure-rate as a function of time due to log-normal life distribution(s) of weak parts
1977; Elsevier BV; Volume: 16; Issue: 2 Linguagem: Inglês
10.1016/0026-2714(77)90416-4
ISSN1872-941X
Autores Tópico(s)Reliability and Maintenance Optimization
ResumoThe presence of weak parts (i.e. damaged; with shorter life length expectancy) within a batch of components will give rise to a high initial failure-rate which will then decrease by time. Life tests have shown that weak parts have a more or less lognormal life distribution. This distribution has been assumed when calculating the failure-rate as a function of time as well as the influence of burn-in on the failure rate during actual use. A calculator program has been developed that makes it easy to predict the failure-rate during normal use from data retained from life tests.
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