Assessment of Reliability in Accelerated Degradation Testing with Initial Status Incorporated

  • Chengjie Wang
  • Qingpei HuEmail author
  • Dan Yu
Part of the Communications in Computer and Information Science book series (CCIS, volume 1102)


Accelerated Degradation Test (ADT) provides effective information for reliability assessment of performance characteristic of long-life and high-reliability products. Existing typical models and analysis usually assume that the products under test are of high consistency level during the manufacturing process, which implies that the individual differences of the initial performance of the products can be ignored. However, this may not be the case, and the initial performance of the test units may have great impact on the subsequent degradation rate. Both positively related and negatively related are possible. This phenomenon can be observed in many different examples, such as the performance of inkjet printer heads. It means that reliability-related information can be obtained before accelerated degradation test. The study considers the impact of initial performance on the reliability assessment. Based on the existing typical accelerated degradation test model and analysis process, this paper introduces the initial information of the products to carry out reliability assessment and test plan. The asymptotic variance of a lifetime quantile at normal use conditions is considered to obtain the optimum test plan. Results show that the initial performance of the test units can be made use of to improve the accuracy of estimators. The impact of fisher information has been taken into account.


Accelerated degradation test Reliability assessment Random initial degradation Fisher information Asymptotic variance Test plan 



The authors are honored to get invitation for contributing a book chapter to celebrate the 80th birthday of Professor Jinhua Cao. The authors are also thankful for the reviewers’ comments and suggestions.


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijingChina

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