Pauline Coolen-Schrijner

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Age replacement of technical units has received much attention in the reliability literature over the last four decades. Mostly, the failure time distribution for the units is assumed to be known, and minimal costs per unit of time is used as optimality criterion , where renewal reward theory simplifies the mathematics involved but requires the assumption(More)
Nonparametric predictive inference (NPI) is a powerful fre-quentist statistical framework based only on an exchangeability assumption for future and past observations, made possible by the use of lower and upper probabilities. In this paper, NPI is presented for ordinal data, which are categorical data with an ordering of the categories. The method uses a(More)
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