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Assessing the Lifetime Performance Index of Exponential Products With Step-Stress Accelerated Life-Testing Data

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3 Author(s)
Hsiu-Mei Lee ; Dept. of Stat., Tamkang Univ., Taipei, Taiwan ; Jong-Wuu Wu ; Chia-Ling Lei

Lifetime performance assessment has been crucial to the manufacturing industry. In practice, a lifetime performance index CL is used to measure the larger-the-better type quality characteristics. Accelerated life test (ALT) has often been used to yield information quickly so that the life distribution of products can be estimated. This study constructs a maximum likelihood estimator (MLE) of CL for exponential products based on type II right censored data from the step-stress accelerated life test (SSALT). The MLE of CL is then utilized to develop the hypothesis testing procedure with the given lower specification limit L . This new testing procedure can be easily applied to assess whether the lifetime of products meets the requirements. Finally, we give two examples to explicate the proposed testing procedures.

Published in:

Reliability, IEEE Transactions on  (Volume:62 ,  Issue: 1 )