Is community participation the best way to increase access to service delivery?

Dear Hassan, I do not know if it is the best method. What I know from my experience and thorough the literature on natural resource management or ecosystem services, is that: 1) without an explicit engagement of local communities (that is emphasizing the self-policing force of creating reciprocal relationships) in the aims and results; 2) without an equitable agreement among parties (especially the poor one, normally the rural one); the searched effects are not sustainable (in its time and space meaning on each of the 3 pillars). Best regards for you enquiry. Daniel