Methodologies
Active methodologies on the Carrot Network — verified environmental impact through structured methodology, framework, and application layers.
Overview
Methodologies on the Carrot Network define how environmental impact is measured, reported, and verified through digital Measurement, Reporting and Verification (dMRV). Each methodology targets a specific environmental domain and is structured in three layers:
- Methodology — The scientific foundation that defines scope, eligibility, and measurement approaches. May be Carrot-native or based on established external standards such as UNFCCC Clean Development Mechanism methodologies.
- Methodology Verification Framework (MvF) — A structured specification that translates the methodology into concrete verification rules, formulas, and data requirements.
- Methodology Verification Application (MvA) — Open-source software that implements the MvF as executable rule processors. Each rule evaluates MassID documents and returns a PASSED or FAILED result with an explanation.
This three-layer architecture enables dMRV at scale: methodologies define what to verify, frameworks define how to verify it, and applications execute the verification logic automatically.
Native and external methodologies
Carrot supports both Carrot-native methodologies and external methodologies from established standards bodies:
- Carrot-native — Methodologies developed by the Carrot Foundation, such as BOLD Recycling. These cover the full stack from methodology definition through framework and application.
- External — Methodologies defined by external bodies (e.g., UNFCCC CDM), implemented on Carrot through a dedicated framework (MvF). For example, AMS-III.F is a UNFCCC CDM methodology implemented via the BOLD Carbon (CH₄) framework.
Active methodologies
| Methodology | Type | Credit | Token | Description |
|---|---|---|---|---|
| BOLD Recycling | Carrot-native | TRC | C-BIOW | Organic waste diversion from landfills to composting |
| AMS-III.F | UNFCCC CDM | TCC | C-CARB.CH4 | Methane emission avoidance through composting |
Open ecosystem
All methodology rules are open source under the LGPL-3.0 license. Anyone can audit the verification logic, propose improvements, or build new methodologies on the shared infrastructure.
- Source code: github.com/carrot-foundation/methodology-rules
- Governance: Managed by the Carrot Foundation with progressive expansion of community participation.
- Shared infrastructure: Methodologies reuse common rule processors. The majority of rules are shared across all active methodologies.
Learn more
- MvF — How Methodology Verification Frameworks are structured.
- MvA — How methodology rules are implemented as executable code.
- MvF Author Guide — How to write a Methodology Verification Framework.
- MvA Developer Guide — How to implement methodology rules in code.