The paper deals with the products segmentation that is a flexible way of grouping products and simplifies both campaign planning as well as the creation of condition records in trade promotion management.Capacity channels, which are created by segmentation, increases seriality of assembly processes in customised production (Make to Order/Engineer to Order -MTO/ETO). These advantages enhance the competitiveness of the company in terms of cost reduction, acceleration and improvement with product quality increasing.In addition, the paper discusses the procedure how to segment products according of operational time.