LCA, EPD, PCF, and PEF are among the most commonly confused acronyms in sustainability. They are closely related, all are grounded in life cycle thinking, but each serves a distinct purpose, follows different rules, and answers a different question. Understanding the difference matters when deciding what to commission, and what standard it needs to follow.
LCA — Life Cycle Assessment
LCA is the underlying scientific method, standardised internationally by ISO 14040 and ISO 14044. It is not a label or a disclosure format, it is the methodology used to quantify environmental impacts across a product or service’s life cycle, from raw material extraction through manufacturing, use, and end of life. An LCA can be built for internal decision making, eco-design, hotspot analysis, or as the technical foundation underneath a PCF, an EPD, or a PEF.
PCF — Product Carbon Footprint
A PCF is a specific, narrower application of LCA that looks at a single impact category: climate change, expressed in kilograms or tonnes of CO₂e for one product across its life cycle. It is typically aligned with ISO 14067 and the GHG Protocol Product Standard. A PCF answers one question well: how much does this specific product contribute to climate change? It does not, on its own, address water use, land use, or other environmental categories.
EPD — Environmental Product Declaration
An EPD is a standardised, independently verified document that communicates a product’s environmental performance across multiple impact categories, based on an underlying LCA. EPDs follow ISO 14025 (the type III environmental declarations standard) and, in construction and building products particularly, EN 15804 in Europe. Every EPD is built to a specific Product Category Rule (PCR), which sets the exact boundaries, data requirements, and impact categories that products in that category must report, so that EPDs for the same type of product can be meaningfully compared. Unlike an internal LCA, an EPD is meant for external publication and requires independent, third party verification.
PEF — Product Environmental Footprint
PEF is the European Commission’s own harmonised LCA-based method, developed to create one consistent way of measuring and communicating product environmental performance across the EU single market, so that companies aren’t forced to satisfy multiple, incompatible national eco-label or footprint schemes. A PEF study is built against a Product Environmental Footprint Category Rule (PEFCR) and assesses 16 environmental impact categories, not just climate change, including water use, resource use, and ecotoxicity, using the Commission’s prescribed calculation and data quality rules.
| Term | What it measures | Governing standard | Typical use |
|---|---|---|---|
| LCA | Multiple impact categories, full method | ISO 14040 / 14044 | Internal analysis, eco-design, hotspot analysis, foundation for PCF/EPD/PEF |
| PCF | Climate change only (CO₂e) | ISO 14067 / GHG Protocol Product Standard | Carbon disclosures, customer requests, product carbon labelling |
| EPD | Multiple impact categories, per Product Category Rule | ISO 14025, EN 15804 (EU construction) | Independently verified, published environmental declarations |
| PEF | 16 impact categories, EU harmonised method | European Commission PEF method & PEFCRs | EU market comparability, upcoming EU green claims and labelling |
How Do They Relate to Each Other?
All three, PCF, EPD, and PEF, are built on the same foundation: a Life Cycle Assessment. The difference is scope (one impact category vs many), governing rules (product specific PCRs vs the EU’s own PEFCRs), and purpose (a carbon number for disclosure, a verified multi-category declaration, or an EU-wide harmonised comparison). In practice, the underlying inventory data collected for one can often be reused, with adjustments, to build the others, which is why it is worth deciding your full set of reporting needs before scoping the underlying LCA.
Can ecorune Deliver All Four?
Yes. We build the underlying LCA to ISO 14040/14044, and from that same foundation deliver Product Carbon Footprints aligned with ISO 14067, Environmental Product Declarations prepared against the relevant Product Category Rule and supported through independent verification, and PEF studies aligned with the European Commission’s PEFCR requirements where EU market comparability is the goal. We scope the work around what you actually need to communicate, and to whom.