一、等间隔期定期进货法在目前,设备维修备件还不可能随时随地用一件买一件,除特殊件外,绝大部分备件还是按预修计划或数理统计方法“定期进货”。从编制备件订货计划来看,常常习惯按一定“间隔周期”确定需要量,如一周、一月、一季等等。但是进货的间隔期都有相同和不同之分。我们的根本目的还是寻求经济批量。所谓等间隔期定期进货法”,就是事先根据经验,人为地划分几种进货间隔期,然后依据“总费用=总订货费用+总储存费用”,计算不同进货间隔期的总费用 First, the regular interval purchase method At present, equipment maintenance spare parts can not be bought one at a time with any place, except for special parts, most of the spare parts or according to the pre-repair plan or mathematical statistics method “repeatedly.” From the point of view of the preparation of spare parts ordering plans, it is often customary to determine the required amount according to a certain “interval period”, such as one week, one month, and one quarter. However, the interval between purchases is the same and different. Our fundamental purpose is still to seek economic bulk. The so-called regular interim period purchase method is based on prior experience, artificially divide several kinds of purchase intervals, and then calculate the total cost of different restocking intervals based on the “total cost = total ordering costs + total storage costs”.