Estimation of reliability of mobile handsets using Cox-proportional hazard model

To improve the design reliability of a mobile handset, this paper not only estimates the reliability of mobile handset of two leading makes but also makes a comparative study between the sets. The paper analyzes the causes of failure and the failure rate through Cox proportional hazard model. Baseline life distribution has been studied using the Weibull form and mean lives have been estimated under both absence of the causal variables and presence of the causal variables at their respective mean values.