考慮進料價格及售價之最佳存貨政策

Abstract

許多產品的進料價格隨時改變，零售商採購原料時會考慮不同採購時點有不同的進料價格，此外，大部份的顧客需求會受到零售商的販賣價格影響。本研究探討供應商原料價格為線性遞增與顧客需求為零售商售價及時間的函數構建零售商單位時間平均利潤模式，求解最適的零售商售價、訂購量及下次訂購時點。該利潤模式包括收益、原料成本、訂購成本及持有成本，由於本研究考慮到進料價格的不確定性，因此，零售商可以根據所預測的進料價格，決定最佳的存貨政策。

A lot of products unit cost still change all the time. Retailer will consider the different unit price by different time when purchasing material. Beside, retailer’s sale price also impact most customer’s request. In this paper, we explore the supplier’s unit cost is linear up trend and customer’s request is the function of retailer’s unit price and time to constant the model of average profit of unit time of retailer to solve the optimal retailer’s unit price, purchasing quantity and next purchasing time. The profit model included gain, income material cost, purchasing cost and holding cost. By taking the uncertainty of unit cost into account, retailer can do the optimal inventory replenishment policy by unit cost predicted.