Authors
1 Izmir University of Economics
2 Department of Statistics, University of Isfahan, Isfahan, Iran.
Abstract
We consider a (n-k+1)-out-of-n system with exchangeablelifetimes 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.
Keywords