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Based on system dynamics (SD), a high order delay inventory control model of supply chain is proposed. The high order delay in SD is regarded as transition between first order lag and pure time delay (PTD), it describes the more general delay mode in real systems. With simulation, the stable boundaries of inventory control model under high order delay are confirmed, and the effect of variations in delay mode on stability of inventory control system is analyzed. It is concluded that the reduction of delay order and delay time can improve the stability of inventory control model under high order delay; the sensibility of decision parameters to the change of system order is nonlinear.

THE RESEARCH ON STABILITY OF SUPPLY CHAIN UNDER HIGH ORDER DELAY