Preparing the published article.
Data Sources, Verification Levels and Disclaimer
What our figures mean, and what they do not.
Sources we use
- International and national statistics and industry association reports.
- Published standards and regulatory texts, cited by edition and date.
- Company filings, annual reports and official product documentation.
- Field experience reported by integrators and operators, labelled as commentary.
Verification levels
| Level | Meaning | Reader guidance |
|---|---|---|
| Verified | Checked against a primary source at the date shown | Safe to cite with the source |
| Reported | From a credible secondary source | Confirm before relying on it commercially |
| Estimate | Range or modelled figure | Use for context only |
Disclaimer
This site provides information for research and planning. It does not provide engineering design, safety certification, legal advice or investment advice. Figures quoted from third parties may be revised by those parties. Always confirm standards references and regulatory obligations against the current official text, and take professional advice before making an equipment or compliance decision.