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Glossary

Process tree

The process tree is the structure that breaks a product type down into its materials and operations, so that every node carries its own physical factor.

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It allows the result to be explained step by step and traced to the factor of each node. It is the basis of the traceability of a Xain certificate: anyone can see where every kilo of CO2e comes from.

  • Most conservative factor

    In Xain’s method, the most conservative factor is the one applied when the documentation leaves a doubt: the one that gives the highest emissions value is chosen.

  • Methodology

    How Xain calculates the product carbon footprint: physical factors, process tree, most conservative factor and primary data. An ISO 14067 methodology by LRQA.

  • Physical factor

    A physical, or activity-based, factor expresses emissions per physical unit: kgCO2e per kilo of material, per kWh of energy or per tonne-kilometre of transport.

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