Assessing the Lifetime Performance Index of Exponential Products With Step-Stress Accelerated Life-Testing Data
Lifetime performance assessment has been crucial to the manufacturing industry. In practice, a lifetime performance index C-L 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 C-L for exponential products based on type II right censored data from the step-stress accelerated life test (SSALT). The MLE of C-L 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.
lifetime performance index maximum likelihood estimator type ii right censored data step-stress accelerated life test hypothesis testing procedure