Resource
Product LCA data guide
What materials, energy, logistics, waste and use data are needed to start a defensible LCA.
Why it matters
A defensible LCA depends on input-data quality, not on the software. Before modelling you must gather materials, energy, logistics, waste and use data, and clearly define scope and functional unit. This guide lists what to collect so the result withstands verification (ISO 14040/44).
Scope and functional unit
Define the system boundary (cradle-to-gate or cradle-to-grave) and a clear functional unit; it is the decision that most shapes the result.
Primary vs. secondary data
Collect primary data from your operation wherever you can; buyers increasingly penalize database averages.
Document assumptions
Every assumption and emission factor must be traceable; that is what lets the LCA be verified and later turned into an EPD.
What it includes
- Which materials, energy and logistics data to gather
- How to define scope and functional unit
- Common assumptions and how to document them
- Mistakes that weaken the credibility of results
- Final checklist before starting the LCA
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