One of the important part of the company’s success – it is a high – quality of sales forecasting. Correctly calculated forecast allow doing business more effectively, first of all, to correct and optimize expenses. Besides if it comes to production, it allows creating the most optimal (instead of overestimated or underestimated) production stocks in a stock house. However, together with it, forecasting is a difficult task, because the demand and sales depend on seasonably, the dynamics of the business, the competitive environment, pricing, marketing activities and more other factors. There are no simply ways to construct suitable forecast for all occasions. The modules of forecasting construct in some registration systems, that can be used only for formation an elementary predictive models.