Situation → Problem → Implication → Need-Payoff
The canonical SPIN arc starts with Situation questions (setting the scene), moves to Problem questions (what hurts), then Implication questions (what does that cost you), and finally Need-Payoff questions (what would solving this be worth). Most reps over-invest in Situation and rush Implication. AptSay tracks how long you have spent in each stage and warns you when the ratio is off.