A quick Playtest over the weekend helps you find out if you've got a hit on your hands. Test several prototypes to see what sticks.
This is where you experiment and test your riskiest assumptions. While discussions within the team might get heated, a quick Playtest gives you all the answers.
When you are approaching release, get more fans involved. Cut your QA time in half, and understand how your fans view your game!
Celebrate, but never stop learning. Keep improving and test your changes with Playtest before releasing it to the public.
Dan Prigg (Director of Game Operations at GameHouse)
Sebastiaan van Waardenberg (Game designer at Blue Giraffe)