MODEL ECONOMIC ORDER QUANTITY (EOQ) UNTUK BARANG YANG SALING BERKORELASI DISEBABKAN OLEH CROSS-SELLING

This undergraduated thesis is discussed on an inventory model which there is two items, the major item and the minor item. The demand of major item influences the demand of minor item, its called cross-selling. The demand of minor item will be lost if the demand of major item can’t be fulfilled. In this model, the minor item should not be stockout so there is three condition, Economic Order Quantity (EOQ) model for correlated demand is caused by cross-selling without stockout, EOQ model for correlated demand is caused by cross-selling with forfeit all demand, and EOQ model for correlated demand is caused by cross-selling with parsial backorder. The numerical simulation at the “Pinokio” store shown that by using the Economic Order Quantity model for correlated demand is caused by cross-selling without stockout we have cost efficiency 34,61%, at “Ragil Cell” store shown that by using the Economic Order Quantity model for correlated demand is caused by cross-selling forfeit all demand we have cost efficiency 12,84%, and at the “Tiga Putra” store shown that by using the Economic Order Quantity for correlated demand is caused by cross-selling with parsial backorder model we have cost efficiency 46,59% Keywords: Economic Order Quantity, Stockout, Forfeit All Demand, Partial Backorder, Cross-selling, Major Item, Minor Ite