{
  "schemaVersion": "crawler-atlas-1",
  "atlasVersion": "atlas-2026-07-28-v1",
  "canonical": "/atlas/measurement-quality",
  "title": "Measurement quality",
  "category": {
    "slug": "quality",
    "title": "Quality, provenance, and observability"
  },
  "definition": "Measurement quality is the degree to which telemetry supports the claim being made from it.",
  "mechanism": "Reliable observability separates online traffic, local tests, simulations, deterministic mocks, dashboard requests, resources, pages, and sessions.",
  "validation": "Require source class, environment, deployment, server and schema versions, resource type, status, latency, and a documented denominator.",
  "commonFailure": "Mixing synthetic crawler runs with public traffic produces precise-looking totals that answer no coherent question.",
  "related": [
    "/atlas/provenance",
    "/atlas/error-budgets"
  ],
  "modified": "2026-07-28"
}