Four of fifteen categories, and why we say so
Scope 3
Scope 3 is where most carbon software overstates itself. We model four of the fifteen categories. The other eleven appear on your board and on your report as stated omissions, so nobody mistakes an incomplete inventory for a finished one.
Last updated 2026-09-04
What is modelled
Four categories, each naming the method used and the data-quality tier it produces. Category 1 purchased goods and services is spend-based, using the USEEIO supply-chain factors. For a non-US organisation that is a United States economic proxy, and the report says so on the face of the disclosure rather than in a footnote.
A spend-based figure is money multiplied by an industry average. It cannot tell a good supplier from a bad one, so it is a starting point rather than a measurement, and it is marked as an estimate everywhere it appears.
What is not, and why that is on the page
Eleven categories are not modelled. Hiding them would let a company believe a four-of-fifteen inventory was finished, which is the failure mode that ends a compliance vendor. The completeness register lists all fifteen, marks the eleven, and the filed report prints them as stated omissions.
We will not claim "full Scope 3" or "all 15 categories". If a competitor’s feature grid says otherwise, ask them which method each category uses and what data-quality tier it produces.