The final report on the Accountability Maturity Assessment Model (AMAM) by UNaccountable evaluates UN accountability. It critically reviews composite indicator (CI) methodologies from the OECD and European Commission, highlighting the need for balancing methodological diversity and simplicity, addressing uncertainties, and engaging stakeholders. Key recommendations include leveraging advanced visualization, expanding global stakeholder engagement, and ensuring regular updates to maintain AMAM's relevance in the changing global context.