ADR-006: Quality tiers (A–E working model)
- Status: Accepted (working labels; bounds tunable after pilot)
- Date: 2026-07-17
Context
Open question #6. Need honest distinction between reference, profiled, informal, and imported measurements.
Decision
Adopt working tiers A–E as defined in ../architecture/calibration-and-quality-tiers.md. Public map must not treat tiers as equivalent. In-service crowd data remains survey-grade at best.
Consequences
Pipeline and map require tier + sample size gates; documentation must explain tiers to non-specialists.