Queueing of Seasonally Demanded Spare Parts in a Repair Shop of a Closed-Loop Supply Chain

Spare parts in the aviation industry are repaired after removal from the aircraft and led back to stock, forming a closed-loop supply chain. Typically the demand of spare parts is assumed to follow a homogeneous Poisson distribution. The repair times in the shop with limited capacity are taken to be exponentially distributed. This paper investigates the effects of non-homogeneous demand and the resulting queue in the repair shop due to limited capacity in periods of high demand.