美国及西欧的业主大部分根据古典物料管理思想制定物料需求计划,订购的批量大,次数少,需要建造仓库,存放物料,以备生产之需。物料的闲置,显然是制约主产效率提高的因素。与古典物料管理思想相反,日本的业主认为存货是“罪恶”或者“存货乃万恶之源”, Most of the owners in the United States and Western Europe formulate material requirements plans according to the classical materials management thinking. The order quantity is large and the number of orders is small. It is necessary to build warehouses and store materials for production needs. The idleness of materials is obviously a factor that restricts the increase of main production efficiency. Contrary to classical materials management ideas, Japanese owners consider inventory to be “sinful” or “inventory is the source of all evil”.