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Point and Interval Estimation for a Simple Step-Stress Model with Type-II Censoring

Summary: [This abstract is based on the authors' abstract.]Accelerated testing allows experimenters to increase stress levels to obtain information on the lifetimes of experimental units more quickly than under normal operating conditions. In step-stress tests, the stress levels can be increased at fixed times during the experiment. A simple step-stress model under Type-II censoring is discussed in which the maximum likelihood estimators of the parameters are derived assuming a cumulative exposure model with lifetimes being exponentially distributed. Confidence intervals for the parameters are also derived and their performance assessed through a Monte Carlo simulation.

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  • Topics:
  • Keywords: Bootstrap methods,Exponential distribution,Life testing,Maximum likelihood estimate (MLE),Moment estimation,Stressing,Type 2 censored sample
  • Author: Balakrishnan, N.; Kundu, Debasis; Ng, Hon Keung Tony; Kannan, Nandini
  • Journal: Journal of Quality Technology