Abstract
The degradations of engineering components can be dependent. This study considers that a d-dimensional subordinator constructed based on Levy copula can be used to model the dependency. Three procedures to estimate model parameters of the process constructed based on Clayton Levy copula with the gamma processes as marginals are investigated through simulation. The first one assumes that jumps of the processes are observable; the second one uses the increments of degradation as samples; and the third one is based on the concept of jump tail dependence coefficient. An application is presented by estimating model parameter and calculating the system reliability.