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信頼性(Reliability)
The probability that [a system] an item will perform a required function
without failure under stated conditions for a stated period of time.
(システムが)求められる機能を、定められた条件の下で、定められた期間に
わたり、障害を起こす ことなく実⾏する確率
P. O'Connor and A. Kleyner, Practical Reliability Engineering, 5th edition: Wiley, 2012.
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