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Maximum Likelihood Estimation For The 2-Parameter Weibull Distribution Based On Interval-Data

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3 Author(s)
Flygare, Mark E. ; Hercules Inc.; Salt Lake City, POBox 98; Magna, Utah 84044 USA. ; Austin, John A. ; Buckwalter, Ross M.

MLE techniques are presented for estimating time-to-failure distributions from interval-data. Interval-data consist of adjacent inspection times that surround an unknown failure time. Censored interval-data bound the unknown failure time with only a lower time. The 2-parameter Weibull distribution is examined as the failure distribution. Parameter estimates from interval-data and from the midpoints of the intervals are compared for 6 shapes of the Weibull distribution. The results from Monte Carlo simulation runs are used to examine the s-bias and S-variability of the parameter estimates.

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Reliability, IEEE Transactions on  (Volume:R-34 ,  Issue: 1 )