Backorder Fuzzy Inventory Model under Function Principle

In this paper, the fuzzy inventory model is discussed, especially in the case of permitting backorder under the fuzzy environment of fuzzy demand, fuzzy order cost, fuzzy inventory cost, and fuzzy backorder cost. We use the function principle, instead of the extension principle, to calculate the total fuzzy inventory cost. We also apply the median rule to find the optimal economic order quantity (EOQ) and shortage quantity.