Abstract
This paper considers the optimal choice of productivity (load) of components in 1-out-of-N non-repairable cold standby systems. It is assumed that each system component can function at different levels of productivity (load) and that the life time acceleration factor as well as operational and replacement costs of each component are affected by its productivity. We present a model for evaluating the standby system reliability and expected mission cost. Furthermore, we formulate and solve the optimal load distribution problems in which the mission cost is minimized subject to system reliability constraint. Both fixed and variable sequences of component initiation are considered. Illustrative examples are provided.