存貨管理在企業的經營中，一直扮演著相當重要的角色。在實務上，一個存貨管理者最直接面對到的難題，就是需求的不確定性，在過去有關不確定性環境下的存貨模型，大都在討論存貨模型中成本係數模糊化的問題，而本研究主要考慮需求在不確定下之批量訂購存貨政策，所討論的模型將包括經濟批量訂購模式與允許缺貨之經濟批量訂購模式。
近年來，耗損性商品的存貨管理問題開始受到重視。在傳統的存貨模型中，通常是假設存貨式永不耗損的。而在現實生活裡，不耗損的存貨幾乎是不存在的，因此耗損性存貨管理問題的討論有其存在之必要性，但是考量到耗損性的問題時，也往往擴大了存貨模型的困難度。
本研究將耗損性因素考慮於模糊化的存貨模式中，考慮耗損率為固定常數的情況，並為了應用之廣泛性，將模糊需求率之歸屬函數定義為一般型式之模糊數，希望能藉此提高存貨模式在實務上之應用性，而本研究之解法主要是應用Yager之模糊數排序法，直接對具有模糊性之總成本函數來排序，不同於以往相關文獻之先將總成本函數解模糊化為一個確定數後再利用數學規劃的方法求解。

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