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Estimation of Reliability from Multiple Independent Grouped Censored Samples with Failure Times Known

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2 Author(s)
Bilikam, J.Edward ; FMC Corporation; 1105 Coleman Ave.; PO Box 1201; San Jose, CA 95108 USA. ; Moore, Albert H.

Failure times of one type aircraft-engine component were recorded. In addition, life times are periodically recorded for unfailed engine components. The data are considered as multiple s-independent grouped censored samples with failure times known. The assumed failure model is the 2-parameter Weibull distribution. Maximum likelihood estimates are derived. The exponential model is used for comparison. Monte Carlo simulation is used to derive s-bias and mean square error of the estimates. The asymptotic covariance matrix was computed for the sampling conditions studied. The maximum likelihood estimates of the reliability were obtained as a function of component operating time since overhaul.

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Reliability, IEEE Transactions on  (Volume:R-27 ,  Issue: 5 )