Supply Chain Carbon Footprinting Standards Comparison Chart

Supply chain carbon footprinting focuses on quantifying indirect emissions—particularly Scope 3 emissions—originating from upstream (e.g., purchased goods, transportation) and downstream (e.g., product use, end-of-life) activities beyond an organization’s operational control. Key standards compared in such charts include the GHG Protocol Corporate Value Chain (Scope 3) Standard, ISO 14067:2018 (Carbon Footprint of Products), PAS 2050:2018, and emerging frameworks like the SEC Climate Disclosure Rules and the EU’s Corporate Sustainability Reporting Directive (CSRD) with its ESRS E1 standard. Each standard differs in granularity: the GHG Protocol emphasizes activity-based and spend-based calculation methods with 15 Scope 3 categories; ISO 14067 adopts a life cycle assessment (LCA) approach per ISO 14040/44, requiring system boundary definition and allocation rules; PAS 2050 offers prescriptive tiers for data quality and uncertainty handling. Practical application requires cross-functional collaboration—procurement, logistics, R&D, and finance—to gather primary activity data or apply industry-average secondary datasets (e.g., Ecoinvent, DEFRA, EXIOBASE). Assurance pathways also vary: some standards mandate third-party verification (e.g., under CSRD), while others recommend it (e.g., GHG Protocol). As regulatory pressure intensifies and investors demand transparency, this comparison chart serves as a strategic decision-support instrument for standard selection, gap analysis, and roadmap development toward science-based targets (SBTi) and net-zero commitments.