It is very important to select new pharmaceutical products among the world's successful and best-selling products. What seems problematic in the development process of the portfolio of products is the analysis of potential and actual competitors and the rate of success of new products in achieving share from the pharmaceutical market. For this purpose, experts of pharmaceutical industry have been consulted in determining the factors affecting the development of the portfolio of products. The

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... ults of the data analysis suggest that the criterion "three-past-year average sales of pharmaceutical companies" is the most important. A Review of the Theoretical Fundamentals and Literature 2. We will explain the portfolio of products of pharmaceutical companies and multi-criteria decision-making in this part.