Based on both the ordered quantity and lead time as decision variable, this article proposes a single item multi-supplier model that considers inventory problems with quantity discount and backorder.

• 摘要在订购量与前置时间为决策变数之前提下，本文提出一个考虑数量折扣与允许部分欠拨之单一商品与多个供应商存货模型；