It includes the product development, purchasing and stock management of the raw materials, the plan and control of the order process, the quality management for the process, etc.
其中包括订单产品开发，物料采购和库存管理，订单生产流程的计划和进度管理，订单生产过程质量管理等。
However, the study also shows that the raw materials can be purchased either using the JIT purchasing method or the traditional economic order quantity (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。
In order to improve the purchasing efficiency, save the purchasing cost and ensure supply on time, a purchasing portfolio based on purchasing materials characteristics for steel industry was proposed.
为提高采购效率，节约采购成本，保证准时供应，针对钢铁行业提出了一种基于采购物资属性的采购分组方法，在此基础上研究了采购策略。
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