On Constant Stress Accelerated Life Tests Terminated by Type-I Hybrid Censoring at One of the Stress Levels

• Main Authors: Yao-Yu Hsu, 許耀宇
• Other Authors: 林千代
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/18369999478543572725

碩士 === 淡江大學 === 數學學系碩士班 === 102 === In this paper, we consider a constant stress accelerated life tests terminated by a hybrid Type-I censoring regime at one of the stress levels. A model based on a general log-location-scale lifetime distribution with mean life which is a linear function of stress, along with constant scale, is discussed. The exact expectations associated with the likelihood function for the asymptotically valid variances of maximum likelihood estimates of model parameters are derived. The agreement with observed counterparts for finite samples in simulation study is also assessed. Finally, under the constraint that the total experimental cost does not exceed a pre-specified budget, the design yields better estimate of 100p-th percentile at normal operating condition is obtained.