MECE: One Bucket Each, No Piece Left Behind
🔍 What Is It? MECE means sorting things into groups where nothing overlaps and nothing gets left out. MECE stands for Mutually Exclusive, Collectively Exhaustive — which sounds fancy but just means two simple rules. Rule one: each thing belongs to exactly one group, never two at once. Rule two: every single thing belongs to some group, nothing gets forgotten. Grown-ups use it when they tackle big messy problems, like figuring out why a business is losing money or planning a school fundraiser. If your groups overlap, you count the same thing twice and confuse yourself. If your groups have gaps, you miss something important and end up making the wrong call. ...