Optimization of the Spare Parts Storage for the Power Units Equipments

Abstract

In order to elaborate an optimization model for the spare parts storage, we use some assumptions, justified by practice: a) the distribution of the uninterrupted working time and of the uninterrupted reparation time are exponential by respect to the intensity of damages λ and the intensity of the reparations μ p; b) the substitution time is a random variable, following a certain distribution; c) while keeping in storage space or while transportation to/from storehouse, spare parts could be defected, being unable to respond under loads; d) spare part is used only in case that the reparation time is longer than the substitution time; e) the reparation time is known immediately after the damage; f) immediately after the damage, the element is going to be repaired, no matter if it is or it isn’t substituted; g) it is neglected the influence of the spare parts storage on the time of the preventive maintenance actions; h) its possible the refusal of response from the spare part under load, in case of a null interchange.