关键词: 供应链系统, 库存, 稳定性, 提前期, 最大库存策略

Abstract: To deal with the problems existing in supply chain system as prior to supply date, uncertainty of amount and price and momentarily changed market and to guarantee stable inventory of supply chain system, an inventory-controlling model with order-up-to policy in the form of state space equations was provided and a novel method to analyze the stability of the discrete system with constant time delay was proposed. The stability regions of the order policy parameters for inventory systems with variant production lead-time were derived. Dynamic simulations were performed. It was pointed out that stability of the system was only decided by the parameters of the order policy, and incorrect parameters selection would lead to high cost. Thus the conclusion is arrived that the stability is important to a low-cost inventory control system.

Key words: supply chain, inventory, stability, lead-time, order-up-to policy