This is similar-ish to how Valve develops there games. Each week they playtest the game with real people: so basicaly a small "demo" is used each week to see i

This is similar-ish to how Valve develops there games. Each week they playtest the game with real people: so basicaly a small "demo" is used each week to see if the new features are actually good. This is how they actually see asap if what they're doing is good or not. Obviously the big picture has to be taken into account and this obviously won't work for all software.