When you first learn how to play pool, you hit the ball with the stick and hope something falls in. After a while, you learn that really playing requires you to call your shot, and then make it.
Agile methods build in this same "call-your-shot" dynamic. Each iteration, we make a prediction about what features will be present, and put them in. Every day, if we do Scrum-style standups, we'll say...
