Today, life expectancy almost all products significantly decreased compared to the previous year. It certainly makes it difficult for business of all commercial enterprises. In such a situation the advantage of trading companies is that much easier to adapt to market demands of companies involved in the production. The reason for this are much lower financial costs because they require less investment to change the range, in relation to the production companies that have changed the whole plan of production, raw materials and machinery. All this is done because the range of the foundation business, and his choice is determined by the position of the enterprise market. The selection range is affected by many internal and external factors. In order to trade the company made the right decision on the selection of the range it is necessary to research the market, the target group of consumers and their needs and desires. Such research is most easily done through category management that is focused on product categories and all participants in the supply chain. All efforts are made have the same goal, and that is economical operation. This is achieved by satisfying the needs of customers, and this leads to a gain in business and well-being for all participants.