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Journal of Korean Society for Quality Management 1996;24(4): 14-. |
| 병렬형 시스템의 부분적 가속수명검사를 위한 최적계획 |
| 박희창1, 이석훈2 |
1창언대학교 통계학과
2충남대학교 통계학과 |
| Optimal design of Partially Accelerated Life Testing for the Parallel Systems |
| Hee-Chang Park1, Suk-Hoon Lee2 |
1Dept. of Statistics, Changwon National University
2Dept. of Statistics, Chungnam National University |
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| ABSTRACT |
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We consider optimal designs of partially accelerated life testing which is deviced for parallel systems with the considerably long life time. In partially step-stress life testing, test items are first run simultaneously at use condition for a specified time, and the surviving items are then run at accelerated condition until a predetermined censoring time. In partially constant-stress life testing, test items are run at either use or accelerated condition only until a specified censoring time. The optimal criterion for each test is to minimize either the generalized asymptotic variance of maximum likelihood(ML) estimators of the hazard rates at use condition and the acceleration factors or the asymptotic variance of the ML estimators of the acceleration factors. |
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