Title :
Burn-in for Systems Operating in a Shock Environment
Author :
Cha, Ji Hwan ; Finkelstein, Maxim
Author_Institution :
Dept. of Stat., Ewha Woman´´s Univ., Seoul, South Korea
Abstract :
Burn-in is a widely used engineering method to eliminate defective items before they are shipped to customers or put into field operation. Burn-in procedures are usually applied to items with high initial failure rate which operate under a static operational environment. In this paper, we consider burn-in for items that operate in an environment with shocks. We assume that there are two competing risk causes of failure: the `usual´ degradations, and environmental shocks. A new type of burn-in via controlled (laboratory) test shocks is considered, and the problem of obtaining the optimal level (severity) of these shocks is investigated. Furthermore, we combine the conventional burn-in procedure with burn-in via shocks in one unified model.
Keywords :
electric shocks; reliability theory; stochastic processes; burn-in via controlled test shocks; environmental shocks; initial failure rate; stochastic failure model; Cost function; Degradation; Electric shock; Failure analysis; Mathematical model; Testing; Burn-in; combined burn-in procedure; competing risks; environmental shocks; optimal severity; shock burn-in;
Journal_Title :
Reliability, IEEE Transactions on
DOI :
10.1109/TR.2011.2161153