The Business Case
The economic buyer doesn't sign because the demo was impressive. They sign because the numbers survive scrutiny from their own CFO.
ROI vs. TCO — different questions
ROI (Return on Investment) answers "what do we get back relative to what we spend" — usually expressed as a ratio or payback period. TCO (Total Cost of Ownership) answers "what does this actually cost across its full life," including implementation, training, integration, and ongoing operation — not just the licence line. A credible business case uses both: TCO to make an honest, complete cost comparison (including the true cost of the status quo — see loss aversion, Module 03), and ROI to express the net value case simply enough for an executive summary.
Value engineering basics
- Use their numbers wherever possible — a benchmark you supply is a claim; a number they confirm is evidence
- Separate hard, quantifiable savings (headcount, error reduction, licence consolidation) from soft, harder‑to‑defend benefits (agility, morale) — lead the business case with the former
- Show your assumptions explicitly; a business case that hides its math gets rejected the moment someone tries to check it
- Build conservative and aggressive cases side by side — a single optimistic number invites the CFO to dismiss the whole model
A one‑page format that survives an executive's first (and often only) read is at Template 8.
The capex/opex ladder
The most reliable cloud argument in the business isn't technical, and it has three rungs. It works because the customer is instinctively comparing your recurring price to a capital purchase, so you make that comparison explicit rather than letting them do it silently:
- Here's the capital cost if you built it on‑premises — the hardware, the refresh cycle, the capital locked up
- Here's the operating cost of the cloud equivalent, paid monthly, no capital, no refresh
- And here's that same operating cost with a one‑ or three‑year commitment, which is materially lower again
The third rung is what closes it, because what the customer actually wants isn't cheapness — it's certainty. Consumption pricing that moves every month is genuinely worse for a finance manager than a slightly higher number that doesn't. Reserved and committed pricing exists precisely to convert an unpredictable operating cost into something a budget can hold, and framing it that way converts far better than a discount ever does.
The business case gets the numbers agreed. The sheet that follows this module is about the conversations where the scope, the trade‑offs and the internal asks actually get negotiated — which is most weeks, not just at the table with the CFO.