Inventory Management is one of the most important operational management concepts that a company meets on a daily basis. Supplies are necessary for business operations, so thats why their record is so important. Inventory record means tracking inventory from entering the company until the moment of their existence as property of the company. Inadequate handling of stocks may result in production failure and damage due to too long storage. In order to avoid such problems there are methods for managing supplies. According to the ABC stock method, we separate important supplies from irrelevant, and by XYZ methods, we separate the reliable from unreliable and less reliable supplies. Based on these methods, we determine the importance of certain supplies and future orders. We have two different models, traditional and modern management models. Traditional models (EOQs, EPQs) have recently been replaced by modern models (JITs, DRPs, MRPs) that are in trend with modern business conditions.