Through carefull investigation, the fo rmular of about Q and T is developed, the EOQ model is establ ished, and the efficient solving procedure is given.

• 通过详细分析，建立了平均总费用的关于订货周期T、订货量Q的关系，得到了计算最佳Q、T的EOQ模型，并对该模型给出了有效算法.