在某些加工工业中,各种原材料是根据生产工艺的要求,按一定比例结合在一起投入生产制造产品的。由于不同原材料的单价不同,如果实际配料结构与标准配料结构发生差异,对直接材料成本就会发生影响,这样就产生了结构差异(或称配比差异)。为了解各种材料配比结构变动的影 In some processing industries, a variety of raw materials are based on the requirements of the production process, according to a certain percentage of put together into manufacturing products. Due to the different unit prices of different raw materials, if the actual ingredients structure and the standard ingredients structure differences, the direct material costs will have an impact, resulting in structural differences (or the ratio difference). In order to understand the changes in the structure of a variety of materials shadow