Based on the Vendor Inventory Management (VIM) with concurrence of return and stock out, the optimum order cycle (OOC) and optimum order quantity (OOQ) are researched within the cost optimization.

• (3)研究了逆向物流的库存管理，构建了允许缺货与退货的销售库存模型，对其最佳订货周期和最佳订货批量进行了深入研究；