Multicomponent lifetime distributions in the presence of ageing

Lifetime distributions for multicomponent systems are developed through the interplay of ageing and stress shocks to the system. The ageing process is explicitly modeled by an exponential function with rate affected by the ma gnitude of stresses from a compound Poisson process shock model. Applicatio ns of these life distributions and associated failure rates towards the stu dy of multicomponent system survival are discussed. In particular, we illus trate the behavior of these survival functions in relevant subsets of the p arameter space.