Model the impact of a business decision Prompt
Prompt
Model the impact of a business decision. Decision: [hiring / new product tier / new market / vendor switch] Current state: [revenue, costs, headcount, customers] Cost: - One-time: [setup, hiring, dev] - Ongoing: [monthly/annual] Expected benefit: [revenue, savings, or value] Timeline to impact: [months until benefits show] Confidence: [how certain are you?] Please model: 1. Break-even: when do benefits cover costs? 2. 12-month P&L impact month by month 3. Best / base / worst case 4. ROI at 12 and 24 months 5. Key risks that would cause the model to fail
Why it works
Separating one-time costs from ongoing costs and quantifying both the investment and the expected benefit produces the P&L impact analysis that most business decision conversations skip. The breakeven timeline output converts the financial model into a decision-relevant summary — 'this pays back in 14 months' is more actionable than a spreadsheet of assumptions. Building three scenarios (upside, base, downside) makes the risk visible rather than presenting only the case for the decision.
Watch out for
Business decision models are only as reliable as the benefit assumptions, which are almost always optimistic at time of decision. Build in a systematic conservatism adjustment (haircut expected benefits by 20-30%) to compensate for optimism bias. Also ensure the model includes opportunity cost — the capital and management attention invested in this decision cannot be invested in alternatives.
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