Editorial Policy
The rules this site publishes by — what counts as a source, how numbers are checked, and what happens when one is wrong.
Sources
Every model on this site traces to a published source: a peer-reviewed paper, a manufacturer’s published specification, or a long-standing reference work. Sources are named on the page that uses them and gathered on the methodology page. A figure with no source does not ship.
Checking
Before a page goes live, its worked examples are computed by hand from the printed formula, and its calculator is pinned against those cases in an automated test suite. The suite re-runs on every change: a build that fails a pinned case does not deploy.
Corrections
Anyone can report an error through the report an error page. Confirmed errors are fixed, the fix is verified against the source, and material corrections are acknowledged to the reporter. I do not quietly rewrite history: if a published figure changes, the page’s method section says what the figure now is and why.
AI assistance
AI tools help draft and code this site, under the rule stated on the about page: nothing AI-produced goes live unchecked, and every number is verified against its published source by hand. The byline is a person, and the responsibility is his.
Independence
No manufacturer pays for placement, presets or results on this site. Preset values come from published ranges, never from sponsors.