Everyone, many thanks for all your input! I have reached out to you or to those you recommended. Julie, looking at Giirs made it clear to me that sustainability evaluation is needed re: impact investor measurements (hence developing this for such investors or the Mars group would be an 'ask' and I have reached out to them). Dina, yes I agree, the issue is identifying them and Jackson I will write him!
Thomas, many thanks for your input as well -especially your understanding "study a project (funded by and conducted by 3rd parties) and adapt it to the community dynamically, longitudinally". Yes, there have been a handful of such studies we have found (http://valuingvoices.com/catalysts-2/) and analyzed and have done two ourselves and are proposing more... We do have a mixed-method approach which is customized for different clients based on what data they already have against which to measure impact. See our capabilities statement on the right bar here: http://valuingvoices.com/publicationsspeeches/ . Our desire is to be catalytic -- to encourage investors, donors, and others to not only do and use such assessments but also to also design for long-term sustainability by learning from past success for upcoming projects as well as build capacity in-country for such learning. We imagine impact investors, foundations would invest in us as it is a 'game changer' in international development where currently 99% of the time no one returns (making "sustainable development" quite hollow).