This paper (Inventory management models with case studies) presents the methods of inventory management in companies and describes a practical method. This paper seeks to prove the importance of inventory management through theoretical research. The topics that the theory emphasizes are the ABC/XYZ analysis in inventory management, EOQ Inventory Management Model, Balanced scorecard Inventory Management, Kaizen in Inventory Management, Setup of signal stock, and Just in Time Method. The preparation of this paper does not deal with a detailed description of how to manage inventories, but provide inventory management guidelines, and emphasizes the importance of proper inventory management method. This paper also focus on forecasting, its functioning and importance for the enterprise. From the view of inventory management, the problem of inventory remains, the creation of overstock and uncontrollable ordering. The beginning of the paper deals with describing inventory management methods in companies and continues with a more detailed presentation of one of the methods outlined in the example.