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Reliability is a measure of the capacity of equipment or systems to operate without failure in the service environment. This article focuses on reliability in design and presents equations governing the instantaneous failure rate, general reliability function, mean time to failure, mean time between failures, and useful life period. The article explains the calculation of reliabilities for series and parallel arrangements of a complex system. It provides a comparison of probabilistic and deterministic design and concludes with a section on reliability growth.

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Charles O. Smith, Reliability in Design, Materials Selection and Design, Vol 20, ASM Handbook, Edited By George E. Dieter, ASM International, 1997, p 87–95,

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