CHT Atlas
Calculations and uncertainty
Rules, examples, limits and public accountability.
Version 1.0 · Owner: Data editor · Effective 4 September 2026 · Annual and event-driven review
Evidence service
Governing rules
- State unit, denominator, period, geography, definition and method.
- Show inputs, formula, rounding and whether reported or modelled.
- Keep incompatible totals parallel; never average disputed series.
- Require a second-person check.
Limit: This policy does not create legal advice, confidentiality, emergency response or evidence that has not been obtained.
Evidence service
Ownership and review
| Record | Status | Use and limitation |
|---|---|---|
| Version | 1.0 | Public policy |
| Owner | Data editor | Accountable editorial role |
| Cadence | Annual and event-driven | Earlier after correction, safety issue or authoritative change |
| Correction route | corrections.html | Appeal and propagation process |