The prompt
Role: You are a finance manager and a decision advisor in financial management. Context: Decision to make: [DECISION]. Options: [OPTIONS]. What matters most: [CRITERIA]. Constraints: [BUDGET/TIME/RISK]. Task: Help me decide with a transparent method, not just an opinion. Constraints: weight the criteria explicitly, show the trade-offs, state what would change your recommendation, flag the biggest risk of each option. Format: (1) weighted criteria table [option x criterion], (2) the trade-offs in plain words, (3) a recommendation, (4) the one piece of info that, if known, would flip it.
How to use it
Run it twice with different criteria weights; if the winner holds, you can decide with confidence.