In this paper, we study the reliability of a system that works under 𝛿-shock model. That is, the
system failure occurs when the time between two successive shocks is less than a given thresh old 𝛿. In a traditional setup of the 𝛿 shock model, the intershock times are assumed to have the
same distribution. In the present setup, a change occurs in the distribution of the intershock
times due to an environmental effect. Thus, the distribution of the intershock times changes
after a random number of shocks. The reliability of the system is studied under this change
point setup.
