Editorial policy

Evidence and examples

We distinguish public-source observations, working assumptions and constructed examples. A numerical scenario explains a method; it is not an industry benchmark or a customer result. Research method pages do not claim proprietary surveys or datasets that have not been collected.

When evaluating a published figure, follow the original source and check its population, collection period and definition. A reference list is a starting point for that review, not an endorsement of every statement on an external page.

Dates and maintenance

Pages show publication and update dates. An update date records a change to the page, not a certification that every external product, price or rule was independently tested on that date. Check current official documentation before acting on a changing product detail.

Comparisons and tools

Comparisons explain conditions and tradeoffs. Tool guides provide evaluation criteria and official links; they do not claim a universal winner or hands-on testing unless a page explicitly documents that work. Calculator defaults are illustrative, and formulas are shown so readers can inspect the assumptions.

Corrections

Use the contact form to report an error. Include the page, the claim and a primary source or reproducible example. Material corrections should explain what changed. Unsupported research claims identified in the September 2026 review were replaced with clearly scoped measurement guides.

Commercial boundaries

Resource downloads are free. Review and consultation forms record requests; they do not guarantee a delivery date or a scheduled engagement. Any future sponsored placement or commercial relationship relevant to a recommendation should be disclosed on the page.

Reuse

Our original text and worksheets are offered under CC BY 4.0. Give attribution and link to the source page. Third-party material, trademarks and linked research retain their own terms.