| Summary: | 碩士 === 國立交通大學 === 工業工程與管理系 === 91 === 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.
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