【正文】 Cost Components of Inventory Models 庫存模型中的成本構成 Cost ponent 1: Acquisition cost (獲得成本 ) 1. Retailers and wholesalers (such as ACT) replenish their inventory by purchasing the product. （ 購買 ） 2. Manufacturers (such as Eversafe) replenish their inventory of finished products for subsequent sale to their customers by manufacturing more of the product involved. （ 自己生產 ） ? Acquisition costwhether a product is purchased or manufactured, there is a direct cost associated with bringing it into inventory. The direct cost of replenishing inventory is acquisition cost. Cost ponent 1: Acquisition cost ? Notation: c=unit acquisition cost ? ACT Example: – Purchase price=$20per tire – c=$20 per tire Cost ponent 1: Acquisition cost ? The setup cost consists of the various administrative costs (管理成本 ) associated with initiating and processing the purchase order, receiving the shipment, and processing the payment. （準本成本由各種管理成本構成，包括準備和處理購貨單、接收運抵的貨物和處理付款手續(xù)等。 the optimal inventory policy for the basic EOQ model 基本 EOQ模型的最優(yōu)庫存策略 Optimal order quantity ? Min TVC=k(D/Q)+h(Q/2) Let ? Then, Q*= hKD2 022 ????hQkDdQdTVCResult Analysis ? Original Q=1000 tires, now Q*=573 ? Nearly 43 percent reduction in average inventory levels. ? 14 percent reduction in the total variable cost. （ original $2790, now $2407） ? 準備次數由原來的 6次升到了 Sensitivity Analysis ? The accuracy of optimal order quantity depends on the accuracy of the data that went into the analysis. ? Each of these data (k,h) could be off by as much as 10 percent in either