Two basic assumptions of the classical economicorderquantity (EOQ) model are the model has infinite horizon and the costs are static.
经典的经济订购批量（EOQ）问题有两个基本假设：时域无限和模型的费用参数不变。
2
However, the study also shows that the raw materials can be purchased either using the JIT purchasing method or the traditional economicorderquantity (EOQ) purchasing method.
而原材料有的是采用经济订货量(EOQ)采购，有的是采用JIT(及时)采购。
3
For the condition of allowing shortages and time limited backorders, an economicorderquantity (EOQ) inventory model is researched and put forward. It is different from a general one.