How the Prime Diagnostic Score Works

When a board asks "are we ready for AI?", it usually gets back a feeling, a vendor's opinion, or a forty-slide deck. None of those are decisions you can act on. The Prime Diagnostic Score — the PDS — exists to turn that question into a single, defensible number, and to show the working behind it.

This piece explains how the score is built: what we measure, how the pieces combine, and what the result actually tells you. No proprietary mystery — the value is in the discipline of applying it consistently, not in keeping it secret.

Five pillars, one acronym

Readiness isn't one thing. A firm can have brilliant leadership alignment and unusable data, or pristine data and no governance. So we assess five dimensions — the PRIME pillars — chosen because each is independently capable of stalling an AI programme:

How each pillar is scored

Each pillar is assessed against structured criteria and expressed on a 0–20 scale. In the full Prime Diagnostic™ that assessment draws on stakeholder interviews, a review of systems and documentation, and the practitioner's judgement against patterns we've seen across comparable firms. The free online snapshot uses a compressed version of the same logic — fewer inputs, same five pillars.

Twenty per pillar, five pillars, and the maths is deliberately simple: the five sum to a composite out of 100. That's the Prime Diagnostic Score.

Why a composite — not five numbers

We resisted the temptation to leave boards with five separate scores and a shrug. Five numbers invite cherry-picking — a leadership team will quote its strongest pillar and quietly ignore its weakest. A single composite forces a judgement. It places the organisation in one band, and that placement drives the recommendation.

The composite doesn't hide the detail — the pillar breakdown sits right beside it, so you can see exactly which dimension is dragging the score. But the headline number is what gets a room to agree on where things actually stand.

The five readiness bands

The composite maps to one of five bands. The band matters more than the exact number, because it tells you what kind of move is appropriate next:

What the score is — and isn't

The PDS is a decision instrument, not a grade. A low score isn't a failure; it's the most useful thing a board can know before it commits budget, because it tells you what to fix before you build. A high score isn't permission to relax; it redirects the question from "are we ready?" to "where's the edge?"

What the score is not is a one-time verdict. Readiness moves. The point of measuring it consistently — the same five pillars, the same scale — is that you can track whether the work you're doing is actually moving the number.

You can see a compressed version of the PDS in action right now. The free AI Readiness Assessment scores you across all five PRIME pillars in about five minutes — and the full Prime Diagnostic™ delivers the board-ready version with the working shown.