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Fundamentals of Quality Control and Improvement, 4th Edition by Amitava Mitra

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11Reliability

  1. 11-1 Introduction and Chapter Objectives
  2. 11-2 Reliability
  3. 11-3 Life-Cycle Curve and Probability Distributions in Modeling Reliability
  4. 11-4 System Reliability
  5. 11-5 Operating Characteristic Curves
  6. 11-6 Reliability and Life Testing Plans
  7. 11-7 Survival Analysis
  8. Summary
Symbols
imgf(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 1imgt (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)

11-1 Introduction and Chapter Objectives

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 ...

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