关键词: 供应链, 订单放大, 库存放大, 期望净库存量, 期望在途库存量

Abstract: To control volatility of order and inventory as well as reduce the high operation costs in supply chain management, a state space model of supply chain system with multi-input and multi-output was established. Taking customer demand, expected net stock and expected work-in-process level as inputs, and the order quantity, net stock, work-in-process level and expected demand as outputs, the amplification effect of expected net stock and expected work-in-process level on order and inventory were studied. An improved selection method of expected net stock and expected work-in-process level was proposed. The results showed that the proposed selection method could control the orders and inventory amplification effects availably in case of other parameters unchanged. It could not increase the probability of out-of-stock and backlog, and also could reduce the effect of lead time on supply chain system.

Key words: supply chains, order amplification, inventory amplification, expected net stock, expected work-in-process level