The impact and performance measurement of socially oriented organizations varies across regional and country contexts and is also influenced by the extent of the social and environmental problems they seek to address. This impact can be measured by considering the Output (O) of an organization, the ways in which organization influence existing Structures (S) and institutions and how their contribution to encouraging Vitality (V) across problem areas. (Lundström and Stevenson, 2005). These three pillars have an influence on external organizational support from public or private financial sources. With the respect to that model, the main goal of this article is to evaluate different methods of performance assessment to improve that assessment model to be sustainable. A model improvement is based on survey results among beneficiaries of two operational programs 2007-2013 in the Czech Republic, conducted in the year 2015, testing several techniques connected with the social area such as SROI, Organizational Performance Index, Social Impact Assessment (SIA) and Counterfactual analysis. Results confirmed earlier step-by-step analysis, that most successful project were those, who met the criteria (goals) of the supporting body. When beneficiaries prefer more regional needs, the impact score is 10-20% lower.