This study focuses on “Belgrad” Forest “Bentler” Series in İstanbul, Turkey and “Pamporovo” Forest Park in Bulgaria as its subject matter, and dvvells on the most evident Production, Recreation and Water Production/Protection functions. A new methodology was introduced taking as basis the current methodologies in functional planning. The forest formations and types of the research items were determined by a method knovvn as “Dominant Approach” in phytosociology. We also determined the degree of compatibility of stands to the functions they serve. Follovving the phases of the proposed methodology, vve calculated annual functional values of these forests and put them in order of importance.