Six phases
- Mobilise: confirm scope, governance, timetable and information request.
- Diagnose: review requirements, maturity, data and existing disclosures.
- Design: agree methods, boundaries, materiality and workplans.
- Deliver: analyse, calculate, engage and develop management outputs.
- Review: challenge findings, resolve evidence gaps and obtain approvals.
- Handover: transfer methods, files, controls and next-cycle actions.
Acceptance criteria
- Deliverables match the agreed framework and boundary.
- Calculations are reproducible and evidence is organised.
- Limitations and judgement areas are documented.
- Management decisions and approvals are recorded.
- Internal owners can repeat the process.
- Open actions have owners and dates.
Official sources used for this guide
Source position reviewed 2 August 2026. Always confirm the latest rule, standard and implementation guidance for your organisation.