About & methodology

Transparent worksheets, bounded claims.

Tools for Procurement publishes browser-local worksheets for comparing user-entered sourcing scenarios.

Methods and sources

Each worksheet exposes its inputs, formula, assumptions, and decision limits. Guides use worked examples and primary references where a standard definition matters. Quotes, duties, exchange rates, and supplier claims remain inputs to verify with authoritative records.

Tested examples

Displayed default examples are deterministic fixtures checked with the calculation functions. Boundary and invalid entries are tested so errors remain understandable. A result supports review; it does not constitute procurement, legal, tax, customs, or technical advice.

Privacy and dates

Inputs and files are processed in the browser. Editorial dates reflect substantive review—not build time. No contact channel, certification, affiliation, or specialist credential is invented.