A partially accelerated life test planning with competing risks and linear degradation path under tampered failure rate model

In this work, we proposed a partially accelerated life test planning in the presence of competing risks for the products with linear degradation path. The competing risks intensity was considered to be only depended on the degradation value and belong to a parametric family. In the proposed plan, no assumptions are made about failure times distribution and a tampered failure rate model is hold. The maximum likelihood estimation of competing risks intensity parameters as well as the observed Fisher information matrix are derived. A simulation study is conducted to evaluate the performance of the methods and the applicability of the proposed plan is shown by using a real data set.