How do I know the value of social impact effected by our investment into the cause?

Q: How do I know the value of social impact effected by our investment into the cause?

While many of us dream of living in a world where resources are limitless, we all know this is not the case. As a result, organizations need to choose where to invest time and money to optimize for the greatest return. However, impact measurement is still immature at best—both for social impact organizations with members on the ground directly advancing the cause and for sponsors and funders.