... of this distribution is assumed to be a log-linear function of the stress, and a tampered failure rate model holds. The progressive Type-I censoring reduces the cost of testing. Due to constrained resources in practice, the test design must be optimized carefully. A numerical study is conducted to illustrate...

... of this paper is to design constant-stress PALT with dependent competing causes of failure using the tampered failure rate model. Design/methodology/approach Gumbel–Hougaard copula is used to model and measure the dependence between the life times of competing causes of failure. The use of the copula...