---
title: "HMT Magenta Book — Evaluation Guidance — KYE Protocol™ coverage"
description: "HMT Magenta Book — Evaluation Guidance coverage by KYE Protocol™ — every requirement bijection-mapped to the KYE™ artefact that enforces it."
url: https://kyeprotocol.com/compliance/uk-magenta-book/
lang: en
source: "KYE Protocol"
---

> HMT Magenta Book — Evaluation Guidance coverage by KYE Protocol™ — every requirement bijection-mapped to the KYE™ artefact that enforces it.

HMT Magenta Book — Evaluation Guidance

# HMT Magenta Book — Evaluation Guidance — 75% of in-scope requirements covered.

3 requirements · 2 in scope (1 enforced · 1 designed) · 1 out-of-scope (outside KYE™’s authority layer). The 75% is weighted over the in-scope base.

**Source:** HM Treasury — 'The Magenta Book: Central Government Guidance on Evaluation' (2020). The cross-government standard for evaluation of interventions; this registry maps process / impact / value-for-money evaluation of AI interventions to KYE™ runtime evidence artefacts. · **License:** Open Government Licence v3.0

## By category

| Category | Reqs | Enforced | Designed | Advisory | Deferred | Coverage |
| --- | --- | --- | --- | --- | --- | --- |
| Process evaluation | 1 | 1 | 0 | 0 | 0 | **100%** |
| Impact evaluation | 1 | 0 | 1 | 0 | 0 | **50%** |
| Evaluation evidence | 1 | 0 | 0 | 0 | 0 | **0%** |

## Every requirement → the KYE™ artefact that enforces it

| ID | Title | Status | KYE™ enforcement |
| --- | --- | --- | --- |
| `uk-magenta-book.process-evaluation` | Process evaluation — how the intervention was delivered (the AI tool's actual operation, recorded) | enforced | **audit\_events**: `kye.evidence.observed_action.v1`, `kye.evidence.pack.v1`, `kye.evidence.decision_map.v1` **engines**: `internal`, `internal` **rule\_packs**: `kye:rule-pack:public-sector-governance` **dictionaries**: `internal` **constitution\_refs**: `constitution/13-RESILIENCE-LOOP.md`, `constitution/21-DELEGATED-AUDITABILITY.md` |
| `uk-magenta-book.impact-evaluation` | Impact evaluation — what difference the AI intervention made (counterfactual / outcome assessment) | designed | **audit\_events**: `kye.consequence_map.v1`, `kye.risk.score.v1` **engines**: `internal` **rule\_packs**: `kye:rule-pack:public-sector-governance` **constitution\_refs**: `constitution/13-RESILIENCE-LOOP.md` |
| `uk-magenta-book.evaluation-evidence-vfm` | Value-for-money and the evidence base for the evaluation conclusion | out-of-scope | **constitution\_refs**: `constitution/18-OPERATING-MODEL.md` |

Canonical KYE™ surfaces referenced on this page: [KYE Protocol™](https://kyeprotocol.com/).