Inventories are buffers or tampons between input streams and output streams of material suppliers. In fact, they represent short-term tangible assets that are for sale in the ordinary course of business or production of products for sale. They are found throughout the supply chain. In order for a business to operate normally, it must dispose of certain quantities of inventories. However, in the case of oversupply, costs are increased, working capital is blocked, large warehouses are needed, etc. On the other hand, there is a remaining stock in relation to needs, there is a danger of interruption of production, business activities and the same existence of the company. Therefore, the key question is to determine what is the optimal amount of stock and what types of stock to keep in stock. The goal is to find trad offs between the customer that satisfy speed responses and lower costs for businesses. Inventory management represents all the necessary activities to ensure the availability of products that could ensure the optimal operation of the company. The main reason for unreported supply and demand. In inventory management, there is a problem of inventory shortages, the so-called not in stock. Not in stock, but when the product you want is not available in the police or in the warehouse. Out-of-stock consequences can lead to a temporary or permanent loss of customers.