如今的時尚產品增長速度非常快，尤其是技術與服裝。然而，時尚產品有短暫的生命週期。許多研究探討關於時尚產品及如何預測需求。一般來說人們使用正態分佈來表示需求，因為它有鐘形的形式,類似於短生命週期的需求。另一種預測需求方法來是通過使用Bass模式的需求。該模型有個鐘形的形式而已被用來預測新產品。本研究探討時尚產品使用Bass模型的需求。時尚產品的特點是短生命週期與擁有兩次秩序機會。此外，我們認為製造商和零售商之間的供應鏈都跟隨Bass模型的需求。本研究目標是獲得最佳訂貨量與最加訂貨時間系統用于減少總成本。後來，我們增加行銷工作擴展模式，例廣告, 令創新者及模仿者都被影響到.

Fashion product has grown very fast especially technology and garment nowadays. However, it has short life-cycle. Many researches study about fashion product and how to forecast the demand. Generally they used normal distribution to represent the demand because it has bell-shaped form that is similar with short life-cycle demand. Another way to forecast the demand is by using Bass model demand. The model has a bell-shaped form and has been used to forecast new product. This research studies fashion product with Bass model demand. The characteristics of fashion product that were used are short life-cycle, having two chances to order. In addition, this research considers supply chain between manufacturer and retailer that face Bass model demand. The objective is to obtain the optimal order quantities and the time to place second order that minimize total cost system. Later, the model is extended by adding marketing effort, namely advertising that influences not only innovators but also imitators.

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