|f(t)F(t)R(t)r(t)P a θnrTα||Constant failure rateProbability density function for time to failureProbability distribution function for time to failureReliability function at time tFailure-rate functionProbability of lot acceptanceMean life of productSample sizeRejection numberPredetermined test timeProducer's risk||θ 0βθ 1t (j)n j m j q j||Mean life associated with producer's riskConsumer's riskMean life associated with consumer's riskEstimate of survival function at time tOrdered failure time for jth failureNumber at risk at time t (j)Number of failures at time t (j)Number of patients censored in the interval t (j) to t (j + 1)|
In earlier chapters we dealt with quality assurance and control and explored the notion of quality during the manufacture of the product or the rendering of a service. Our discussion focused on a specific instant in time. In this chapter we examine the concept of reliability.
Reliability is a measure of the quality ...