A study on realization of control of scrap of industrial products through cut of repair parts' price.

由于生产工程的发展，工业产品的价格越来越低。然而，维修价格仍然很高。这些现象使人们选择报废而不是维修。我们必须改变这种状况，维修价格高的主要因素之一是维修零件的生产、储存和分销成本高。降低修理零件的成本是控制工业产品报废的一个很有希望的途径，本研究的目的是探讨如何通过降低修理零件的价格来抑制工业产品的报废。本研究主要包括以下三个部分：1）修理件的经济停产时间修理件的高加工率的主要因素是较大的库存成本。在这一部分中，提出了寻找最佳停产时间的简单方法，并进行了讨论。2）维修件统一的经济效应维修件统一是降低成本最有希望的途径之一。3）促进零部件的再利用降低零部件价格、抑制报废的最有效途径是零部件的再利用。不幸的是，重复使用在日本并不流行。在这一部分中，提出并讨论了两个促进零件再利用的建议。

By development of production engineering, prices of industrial products tend to be lower and lower these days. However, prices of repair remain high. These phenomena make people choice scrap than repair. We have to change this situation.One of the main factors of high price of repair is high cost of production, storage and distribution of repair parts. To cut the cost of repair parts is very hopeful way to control scrap of industrial product.The purpose of this study is to examine the ways to restrain scrap of industrial product through lower prices of repair parts. The study was composed of following three parts.1) Economical time to stop producing repair partsThe main factor of high proces of repair parts is large inventory-carrying cost. In this part, simple way to find optimal time to stop production is proposed and discussed.2) Economical effects of unification of repair partsOne of the most hopeful ways to reduce the cost is unification of repair parts. The author examines this way and it's effect in this part.3) Promotion of reuse of partsMost effective way to cut parts prices and restrain scrap is reuse of parts. Reuse is not popular in Japan, unfortunately. In this parts, two proposals to promote reuse of parts are presented and discussed.