Assurance
The corner of the proposition that answers why should I believe you: credibility, return on investment, and the measures both sides will use.
Assurance is the third corner of the value proposition triangle, and the one suppliers add last and thinnest. It answers the question the customer is too polite to ask out loud: why should I believe you? Three things answer it. Credibility, which is evidence, case studies and track record. Return on investment, which is the payback in the customer’s numbers, not yours. And value capture, which is the measures both sides agree to use to check the promise was kept.
The third is the tell. Only a supplier who believes the promise volunteers the scoreboard. Offer the customer the CPIs you expect to be judged on, and the baseline you will measure from, and you have said something about your confidence that no case study can. Withhold them and the customer will draw the obvious conclusion, however good the references.
Set out in full in: Creating Customer Value Propositions with AI (Kogan Page, 2027), chapter 7.
Related terms
The value proposition triangle
Future state at the apex, offer and assurance at the base, the proposition in the middle. A future state with no offer beneath it is a daydream.
Value capture
Proving the value landed, in both directions: in the customer's KPIs and in your own board's numbers.
CPIs and KPIs
Critical performance indicators are the critical few, tied to your points of difference. KPIs are the important many. If everything is critical, nothing is.
High-impact value proposition
Speaks to a problem the customer actually has, is specific enough to be hard to copy, and carries proof.
See the method run on one real account in three days: the One Page Proposition.