To zero in on the testing you need, you have to balance two perspectives. On the one hand, you want to be aware of and prepare for all key risks/thresholds as you move from where you are now to what you want your social venture to be when it is in its ‘steady state’ (i.e. your model has proven to be a success and growth is predictable and steady. A typical barometer in this regard is what your venture will look like five years after it starts). This will also help make sure you are building towards your goals rather than building a bridge to nowhere (this is a significant risk for start-ups, as discussed below). On the other hand, a lot of your current assumptions will be wrong, so you don’t want to go into too much detail too far down the road.