Climate & Environment
Supplier-Specific Method (Scope 3)
Definition
The supplier-specific method calculates Scope 3 emissions from cradle-to-gate inventory data collected directly from individual suppliers for the specific goods and services purchased — actual product footprints rather than sector averages. The GHG Protocol ranks it the most accurate estimation method for purchased goods and services, capturing genuine differences between suppliers and rewarding buyers that switch to lower-carbon ones.
References
This reference provides supporting context for how “Supplier-Specific Method (Scope 3)” is defined and used.
Source imported for editorial provenance.
Overview
How it is used
The method structures mature Scope 3 programmes, supplier engagement (CDP Supply Chain, SBTi supplier targets), PCF exchange standards (PACT) and assurance of value chain inventories.
Why it matters
Averages describe a sector; supplier data describes a choice — the difference between accounting for a supply chain and actually managing it.