SYNE World Index Methodology.
How 249 countries and territories are scored across four independent pillars, weighted, reconciled against a minimum coverage threshold, and mapped onto the same AAA-D scale used across every SYNE Rating.
Eight sections, start to finish.
Scope & Applicability
What's tracked, and what a listing on the World Index does and doesn't mean.
02Data Sources
The 100+ public and multilateral sources behind every pillar.
03The Four-Pillar Framework
Environmental, Social, Governance and Economy, each scored independently.
04Weighting & Reweighting
Equal 25% weighting, and what happens when a pillar is missing.
05Minimum Coverage & IDC
The 2-of-4 threshold behind every IDC classification.
06Grade Scale
The same six-tier AAA-D scale used across every SYNE product.
07Quadrant Classification
How Standards Alignment and Governance position a country on the two-axis Index.
08Licensed vs. Index-Only
The difference between a fully commissioned rating and a public-data position.
What the World Index does, and does not, do.
The SYNE World Index positions every tracked country and territory worldwide on the same Standards Alignment and Governance-based Data Quality axes used across every SYNE Rating product, scored on the identical AAA-D scale. It is a public, index-only view built from national and multilateral statistics - not, by itself, a substitute for a formally commissioned Sustainability Rating for Governments.
A position on the World Index means a country's public data has been scored against SYNE's four-pillar framework. It does not mean SYNE has conducted on-site verification, engaged with the country's institutions directly, or convened a Rating Committee to sign off the result - that additional layer of assurance is what distinguishes a fully licensed, commissioned rating from an index-only position. Section 08 sets out that distinction in full.
At a glance
- Applies to
- 249 countries and territories tracked worldwide
- Minimum eligibility
- A valid score in at least 2 of 4 pillars
- Commissioned by
- Not commissioned - built from public data, refreshed on a standing schedule
- Geographic scope
- Every region worldwide, including 71 of SYNE's fully licensed jurisdictions
- Excludes
- On-site verification and Rating Committee sign-off, unless a full licence applies
Over 100 public and multilateral sources, mapped to four pillars.
Each pillar draws on a distinct cluster of internationally recognised datasets, so no single data provider's methodology quirks can dominate a country's overall position.
Climate & Resource Data
National emissions inventories, climate risk indices, and multilateral environmental monitoring datasets.
Human Development Data
UNDP, WHO and ILO datasets covering health, education, equity and labour standards.
Institutional Quality Data
World Bank Worldwide Governance Indicators, Transparency International, and national judicial and electoral records.
Fiscal & Macro Data
IMF and World Bank fiscal, debt and growth statistics, and national treasury reporting.
Sources are refreshed as each provider issues a new edition - for example, an updated CPI, WGI, or GFSI release - rather than on a fixed calendar, so a data update can arrive between quarterly Index refreshes without waiting for the next scheduled cycle.
Four pillars, each scored independently on a 0-100 scale.
Every pillar is built from Level Scores and category composites specific to that pillar, using the same fixed absolute grading scale described in Section 06 - never a scale that shifts depending on which countries happen to be scored in a given cycle.
Environmental Performance & Resilience
Climate adaptation planning, natural resource management, emissions and energy transition, biodiversity and land use.
Social Development & Equity
Public health and education outcomes, income and regional equity, housing and basic services access, labour standards.
Governance & Institutional Quality
Rule of law and anti-corruption, fiscal transparency, institutional capacity, political stability and accountability.
Fiscal & Debt Sustainability
Fiscal balance and debt trajectory, macroeconomic stability, external position and reserves, financial system resilience.
Equal weight by default - reweighted, never zeroed, when data is missing.
Each of the four pillars is weighted equally at 25% in the Total Score by default. This is a deliberate, user-confirmed choice rather than a derived statistical result - if a different weighting better reflects a specific analysis (for example, weighting Environmental more heavily for a sustainability-first view), the Total Score can be recomputed as a weighted rather than simple mean of the four pillar scores without changing the underlying pillar data.
When a country is missing one of the four pillars, its Total Score is calculated as the mean of the pillars that are available, automatically reweighted rather than penalised with a zero for the missing pillar. A country missing one pillar has its remaining three reweighted to approximately 33.3% each - the same reweighting philosophy already used within each individual pillar's own item-level scoring, applied consistently one level up.
At least two of four pillars, or no Total Score at all.
Reweighting keeps a country's Total Score meaningful when one pillar is missing, but it cannot rescue a score built on only one pillar out of four - a single data point stretched to represent 100% of a country's position would be more misleading than useful. For that reason, a country must carry a valid score in at least two of the four pillars to receive a Total Score at all.
Countries that fall below this threshold - typically small states and territories with thin public data across multiple pillars simultaneously - are marked IDC (Insufficient Data Coverage) rather than assigned a score built on inadequate evidence. Of the 249 countries and territories tracked, 69 currently fall into this category. IDC is not a grade and carries no implied position on the AAA-D scale; it is a data-availability flag, reviewed every refresh cycle as new public data becomes available.
See the full ranked index table for the current list of countries marked IDC, alongside every pillar grade that is available for them.
The same six-tier scale used across every SYNE product.
A country's Total Score maps onto the identical AAA-D scale applied to companies, projects and suppliers elsewhere in SYNE's ratings - so a grade means the same thing wherever it appears.
Front Runner - the highest combined Environmental, Social, Governance and Economy performance.
Front Runner or Rising Star - strong across most criteria, with only minor gaps.
Rising or Emerging Star - material gaps identified and being actively addressed.
Emerging Star or Backmarker - significant improvement needed across multiple criteria.
Backmarker - fundamental gaps in performance, data, or both.
No material evidence of performance or data available for measurement.
Two axes, four quadrants, one country at a time.
A country's quadrant position is calculated from two axes - Standards Alignment (the average of its Environmental and Social scores) on the horizontal axis, and Governance-based Data Quality on the vertical axis - independent of its overall letter grade, which is why two countries with the same grade can sit in different quadrants.
Front Runners
Strong Standards Alignment paired with strong Governance and data quality. Corresponds to the AAA-AA band on the shared grade scale.
Emerging Stars
Strong governance and verifiable data, applied to a narrower or still-developing Environmental and Social base. Corresponds to the A-B band.
Rising Stars
Solid Environmental and Social performance, with Governance or data verification depth still maturing. Corresponds to the AA-A band.
Backmarkers
Limited Environmental, Social and Governance performance together. Corresponds to the B-C band.
Quadrant position requires both a Standards Alignment input (Environmental or Social) and a Governance score. A country missing both of these - even if it has a valid Total Score from its Economy pillar and one other - cannot be plotted on this two-axis view and is excluded from the quadrant counts shown on the World Index page.
Two different depths of coverage, on the same scale.
The 71 countries where SYNE holds a full licence carry a formally commissioned Sustainability Rating for Governments - engaged directly with the government's own institutions, verified on-site where relevant, and signed off by a Rating Committee, following the full process described in the Sustainability Ratings Methodology.
Every other country shown on the World Index carries an index-only position: modelled from the public data sources described in Section 02, scored against the identical four-pillar framework and grade scale, but without direct engagement, on-site verification, or Rating Committee sign-off. Both are genuine, methodologically consistent positions on the same scale - the difference is depth of verification, not the underlying framework.
Want your country fully rated?
Talk to our public sector team about moving from an index-only position to a fully commissioned Sustainability Rating for Governments.