Why it works: prioritisation is normally taught as a matrix, and a matrix implies the right answer was knowable when you chose. It was not. Here you see a description and how long it has waited — which is all anyone gets in the real version — and the scoreboard is what your choices cost against the best that was available. The item that hurts most is usually the quiet one nobody argued about.
Discuss out loud, then commit. Once you take the round, it is done.