Bairamov I.Tavangar M.2023-06-162023-06-1620151726-4057https://hdl.handle.net/20.500.14365/4616We consider a (n - ? + 1)-out-of-n system with exchangeable lifetimes of the components. The paper investigates the stochastic ordering properties of the residual lifetime of the system under condition that, at time t, at least (n - r + 1) components are alive. Some results are then extended to the case where the system has a coherent structure with exchangeable components.eninfo:eu-repo/semantics/closedAccessExchangeable random variablesMultivariate life distributionsMultivariate stochastic orderMultivariate survival functionSignatures?-out-of-n systemArticle2-s2.0-84949761865