From LCA to EPD: Navigating PCRs and Verification Paths
An LCA can feel like a raw data avalanche. A Product Category Rule (PCR) funnels that data into a language the market speaks, and a verified Environmental Product Declaration (EPD) turns it into a passport that wins specs. Done right, this journey is shorter and smoother than many teams assume.
LCA: the raw material
Every EPD starts with a life cycle assessment, the cradle-to-gate or even cradle-to-grave scorecard of impacts. The goal, scope, boundaries, and data quality rules you set here decide ninety percent of downstream headaches. Recent surveys put primary data collection at nearly forty percent of total LCA effort (NMD, 2025).
PCR: rules that slash confusion
A PCR is the Monopoly rulebook for your product type. It defines functional unit, system boundaries, impact categories, and calculation methods so every brand plays the same game. Without it, comparing two concrete mixes would be like comparing apples to spreadsheets. ISO 14025 calls PCR alignment “essential for market credibility” (ISO 14025, 2024).
Cracking the math: allocation and scenarios
Most disputes in review rooms trace back to allocation choices and use-phase scenarios. Who owns the kiln fuel when one plant makes clinkers for five product lines? How many installation scrap scenarios are credible? Documenting your logic and sensitivity checks saves days during verification. Smart EPD reports that well-annotated models cut review rounds in half (Smart EPD, 2024).
Verification pathways: first party or third party
Some program operators allow self-declared EPDs that skip external review. They publish faster but seldom satisfy green building rating systems. Third party verification adds cost yet unlocks LEED points and public procurement eligibility across North America and the EU. Manufacturers chasing government bids almost always need that third party stamp (ULSP, 2025).
Make your results sell themselves
A clear PCR, rock-solid model, and the right verification path let teams publish in weeks, not months or years, and turn environmental data into revenue.
About the Author
Walker Ryan is a climate-tech entrepreneur focused on driving industrial decarbonization through better data. As the founder and CEO of Parq, he helps manufacturers generate high-quality, third-party–verified carbon disclosures at scale—accelerating a traditionally slow and expensive process. Before starting Parq, Walker led over $200 million in sustainability-focused investments as VP of Strategy & Growth at ReStream Solutions, following earlier experience in investment banking at Deutsche Bank. He brings a rare mix of capital markets expertise and hands-on sustainability knowledge to tackling the infrastructure of industrial emissions.