Contributions

  • O'Muircheartaigh, I. G. - Contributor
  • Naval Postgraduate School (U.S.). Dept. of Operations Research - Contributor

Publication

1986 - Available from National Technical Information Service, Monterey, Calif, California

Language

English

Word Count

13,250 words, Guess

Page Count

53 pages

Identifiers

Alternate Titles

  • NPS-55-86-007.

Description

A number, I, of nominally similar items generate events (e.g. failures) at possibly different rates, or mean time intervals. This paper addresses the problem of appropriately pooling the data from the different sources. The approach is parametric empirical Bayes: true individual item rates are assumed to come from a fixed superpopulation. It is shown how parameters of a superpopulation model can be estimated from all of the data, and combined with individual unit history, can provide improved estimates of individual rates. The procedure can be robust: evidence that a particular rate is far off from the main body of rates permits that outlier to stand by itself, i.e. to resist pooling. Illustrative analyses of data are supplied. Keywords: Robustness; Population(Mathematics); and Charts.

Subjects

Topics

PARAMETRIC ANALYSIS

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