This work presents a theoretical extension to the inventory model EOQ with and without production, representing all variables as crisp and fuzzy quantities. The model is compared against the classical EOQ model with and without production. In this comparison, crisp and fuzzy data were used, and the results and conclusions were contrasted. These representation and reasoning mechanisms enables strategic design for operational decision making in the enterprise, which will make the enterprise a world class company. Key Words: Fuzzy Logic, Inventory, Decision Making, Crisp.