Every change,
on the record.
The formula is versioned like software. Each version lists exactly what changed and when it took effect.
Scores are never retroactively rewritten without a changelog entry. Corrections to evidence are applied at the Monday 06:00 UTC recalculation.
-
v1.1
20 July 2026
Current formula
- —Published the full sub-metric point values for all four pillars
- —Added an end-to-end worked scoring example
- —Published the tie-break rule for equal Index Ratings
- —Quantified the evidence-confidence thresholds (High / Medium / Baseline)
- —Added Appendix A: the house tier list used to weight runway shows
-
v1.0
13 July 2026
- —Initial public formula: pillar weights (runway 40%, campaigns 30%, editorial 20%, cultural 10%)
- —Published the five-year eligibility window
- —Published the time-decay rule (100% / 50% / 10%)
- —Introduced the public confidence labels