EN
In recent decades many companies realize the importance of planning product families and managing their portfolio, in addition to developing products that meet customers’ needs and assuring their quality. Considering the lack of similar research conducted in the furniture industry, this paper presents studies dedicated to furniture manufacturers. The aim of this paper is to diagnose the problems possibly resulting from new furniture implementation and describe main determinants influencing product portfolio. The case study was conducted in three large case goods companies. The conclusions indicate that the most important in determining the final size of product range at a furniture company are: new product strategies, the types and quality of raw materials, a sales price of the product (low, middle or high), and a level of difficulty of its constructing and manufacturing.