The collaboration with CSR BootIQ has had surprising benefits towards improving the development strategy of our organization. The complexity of assessing the social value of „The garden on the roof” project, a process that came with very precise rules, offered us a different perspective towards our own activity. The interviews with our volunteers, that were carefully and professionally conducted, brought us benefits and helped us develop professionally significantly above the most optimistic „empirical: assessments. We took seriously into account the SROI analysis and the recent results indicated that we selected the winning path.