Burn-in by environmental shocks for two ordered subpopulations |
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Authors: | Ji Hwan Cha Maxim Finkelstein |
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Institution: | 1. Department of Statistics, Ewha Womans University, Seoul 120-750, Republic of Korea;2. Department of Mathematical Statistics, University of the Free State, 339, Bloemfontein 9300, South Africa;3. Max Planck Institute for Demographic Research, Germany |
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Abstract: | Burn-in is a widely used engineering method of elimination of defective items before they are shipped to customers or put into field operation. In conventional burn-in procedures, components or systems are subject to a period of simulated operation prior to actual usage. Then those which failed during this period are scrapped and discarded. In this paper, we assume that the population of items is composed of two ordered subpopulations and the elimination of weak items by using environmental shocks is considered. Optimal severity levels of these shocks that minimize the defined expected costs are investigated. Some illustrative examples are discussed. |
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Keywords: | Reliability Burn-in Shocks Heterogeneous populations Optimal severity |
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