---
title: Scoring methodologies · a14y
description: Every scoring algorithm ever pinned by an a14y scorecard. Each scorecard freezes its methodology so historical scores stay reproducible.
doc_version: 0.2.0
last_updated: "2026-06-04T06:16:50.794Z"
---
How each a14y scorecard turns per-check pass/fail/na results into a single 0–100 number. The algorithm is pinned alongside the check set so it can evolve without retroactively changing the scores of older scorecards.

## Methodologies

- [`flat-pool-v1`](/scorecards/scoring/flat-pool-v1/) — pinned by v0.2.0
- [`per-check-mean-v1`](/scorecards/scoring/per-check-mean-v1/) — pinned by v0.3.0-draft

## Sitemap

Full docs site index: [/sitemap.md](/sitemap.md).