Staking one’s impact is actually quite simple- just as social enterprises have financial projections, they need impact projections- yet often don’t have them. Most start-ups that I come in contact with share very detailed three to five year financial projections. I can tell when an entrepreneur has spent countless iterations forecasting revenue growth (typically over-estimated) and expenses for their business (always under-estimated).
When I ask to see projections on social impact, the answer is pretty unsatisfying, often quite general (“we help teachers increase their efficiency” or “we are improving soil health and worker safety”). Everyone has financial pro-formas, almost no one has impact proformas. The notion of specifying impact numbers over a multi-year period is simply not on the radar in most situations.