Abstract
An EIQ table analyzes the relationship between items and shipments in distribution centers and warehouses. This method is used for the planning of distribution centers and warehouses for the selection of the machines and equipment. The EIQ table is a useful technique for the analysis of logistics systems. The EIQ table is analyzed using the method of descriptive statistics. The analysis employs mean value and standard deviation, so it is difficult to carry out a quantitative analysis of warehouses and distribution centers. It is necessary to theoretically analyze characteristics of customers and goods with the EIQ table. This paper proposes the GM(1, 1) model for the analysis of the EIQ table. The procedure of the preparation of the EIQ graph is also explained. Gray theory is applied for accumulation of IQ data and accumulation of EQ data. Gray theory makes it possible to show the shape of the EIQ curve. The shape of the accumulation graph is analyzed from the change of the parameters. It is possible to classify the shape of the EIQ curve from the parameters of the GM(1, 1) model. The theoretical formula in search of the name of goods which came in at the ratio with the largest shipment in the IQ model is introduced. The relationship between a and u of the parameter is introduced from the theoretical formula. In addition, the equation for deciding the scale of the distribution center or warehouse is clarified. The design of a distribution center or warehouse is possible from the theoretical formula of GM(1, 1). The applicability of this paper as well as its effectiveness is illustrated by case studies.
