Iterative refinement

Iterative refinement is like when you make a puzzle. When you first put the pieces together, they don't usually fit perfectly and they might need some adjustment. That's why, after you put the pieces together, you adjust some parts until it's exactly right, or until it looks the way you want it to. It's the same with iterative refinement - you start with a rough plan or idea, then you make adjustments and changes bit by bit until you get the perfect result.