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Higg Assessment Model (HAM)

Higg Assessment Model

Consumer documentation for the Higg Assessment Model: the compiled, versioned form of the Higg Index calculation logic. How to evaluate assessments through the HTTP API or the bundle, the record schema, and the methodology behind the energy, emissions, EECI and FEP figures.

Versions

VersionPublishedDocuments
nextnext 2026-09-11 Higg Assessment Model
Evaluating Assessments via the HAM HTTP API
Using the `model.json.gz` file
Higg Assessments Model Schema Reference
GHGP Protocol Compliant FEM Calculations
GHGP Scope 1 & 2 Alignment Guide
Effective Energy Carbon Intensity (EECI)
Foundational Environmental Performance (FEP)
ham-v0.3.0latest 2026-09-11 Higg Assessment Model
Evaluating Assessments via the HAM HTTP API
Using the `model.json.gz` file
Higg Assessments Model Schema Reference
GHGP Protocol Compliant FEM Calculations
GHGP Scope 1 & 2 Alignment Guide
Effective Energy Carbon Intensity (EECI)
Foundational Environmental Performance (FEP)

Stable links: latest/ → ham-v0.3.0