Methodology — How We Research, Source & Verify
How we research and source
Editorial content is grounded in published, authoritative sources rather than any single vendor: general agronomy and oil-processing engineering references, international and national standards bodies (for example Codex Alimentarius for food standards and ISO for test methods), university extension publications, and industry associations. We synthesize and restate this material in our own words as structured knowledge — we do not copy competitor pages or reproduce copyrighted standard text — and where practice varies we present ranges rather than a single false-precision number.
How figures are derived and labelled
Quantitative values are published as indicative ranges reflecting the spread found in published practice, because real values depend on seed, oil, equipment, scale and conditions. Each quantitative field carries a small provenance record: a source (e.g. published agronomy, engineering practice, editorial synthesis, or public web sources for company data), a confidence level, and a verified date. The green "Editorial · date" badge in an entity infobox is the visible tip of this record; the full structured data is browsable in the open database.
Confidence levels
| Level | Meaning |
|---|---|
| High | Well-established, widely documented practice with little dispute. |
| Medium | Reasonable published ranges that vary with variety, equipment or region. |
| Low | Indicative or contested; a starting point to verify locally. |
Company-directory fields are marked as public-sourced and unverified until claimed, a distinct and deliberately cautious status. See how we verify for the full provenance model.
Quality process before publishing
No page goes live on assertion alone. Each is checked, before publishing, against automated gates covering: content depth (meeting or beating the coverage of what already ranks for the topic, so pages are substantive rather than thin), structure and schema (valid markup, correct schema, self-referencing canonical, working internal links), and neutrality and red lines (no ranking/endorsement language on the directory, provenance present, no fabrication markers, no AI-photo claims). We also maintain a site knowledge graph that flags broken links and orphaned pages, so the site stays internally consistent as it grows. This layered check is how we keep quality and neutrality consistent across a growing platform.
Updates and freshness
Entries carry a verification date so staleness is visible. As better sources emerge — including corrections from practitioners — figures are updated and re-dated. The platform is early and expanding, and coverage grows in planned batches; where a section is still being built, we say so rather than implying completeness.
References and further reading
For authoritative primary sources beyond this platform, readers are encouraged to consult: Codex Alimentarius standards for named vegetable oils and for fats and oils generally; ISO standardized test methods for oil quality; national and regional food-safety and labelling regulators for binding requirements; university agricultural extension services for practical processing guidance; and industry and professional associations in oils and fats. We reference these families of source neutrally and point readers to the official bodies for binding detail — see our standards overview.
Reporting an error
If you find a mistake or an outdated figure, please contact us. We review reports, correct what is warranted, and re-date the entry. Practitioner corrections are especially valued: hands-on experience is exactly the kind of evidence that improves an indicative reference, and keeping the platform accurate is a shared, ongoing effort.