Validation of sustamize's Product Footprint Engine by GUTcert

‍

Product Footprint Engine Successfully Validated by GUTcert According to ISO 14064-3

‍

Reliable carbon footprint calculations require more than comprehensive emission factor databases—they require a transparent and validated calculation methodology.

We're proud to announce that sustamize's Product Footprint Engine has successfully been validated by GUTcert GmbH according to the requirements of ISO 14064-3:2019-04.

The validation confirms that our methodology for calculating Product Carbon Footprints (PCFs) is suitable, plausible, and based on credible data sources, giving our customers greater confidence in every calculation.

‍

What Was Validated?

‍

The validation focused on the methodology behind the sustamize Product Footprint Engine rather than on individual product calculations.

Specifically, GUTcert confirmed that:

• our bottom-up methodology fulfills the methodological requirements for determining Product Carbon Footprints
• calculations follow a cradle-to-gate assessment approach
• the methodology is aligned with the Greenhouse Gas Protocol – Product Life Cycle Accounting & Reporting Standard
• emission factors originate from published and credible sources
• the calculation methodology is suitable and scientifically plausible

‍

Why Does This Validation Matter?

‍

For companies calculating Product Carbon Footprints, the quality of the calculation methodology is just as important as the underlying emission factors.

An independently validated methodology provides greater confidence that calculations are:

• transparent
• consistent
• reproducible
• based on recognized international standards

This is particularly important as product-level carbon transparency becomes increasingly relevant for customer requirements, sustainability reporting, supplier collaboration, and emerging regulations.

‍

Our Bottom-Up Product Footprint Methodology

‍

Unlike generic approaches that rely solely on aggregated datasets, sustamize applies a bottom-up methodology to calculate emission factors. This enables more granular and representative Product Carbon Footprint calculations while maintaining transparency regarding assumptions, data sources, and system boundaries. The validation confirms that this methodology is suitable for determining Product Carbon Footprints using the cradle-to-gate approach.

‍

Validation According to ISO 14064-3

‍

The validation was performed by GUTcert GmbH in accordance with ISO 14064-3:2019-04, the international standard for validating and verifying greenhouse gas statements.

The assessment reviewed:

• the methodological framework
• data sources
• emission factor generation
• calculation logic
• plausibility of the applied methodology

GUTcert concluded that the methodology meets the relevant requirements for Product Carbon Footprint calculations under the Greenhouse Gas Protocol.

‍

What This Means for sustamize Customers

‍

Customers using sustamize benefit from:

• independently validated Product Carbon Footprint calculations
• transparent calculation methodology
• credible emission factor generation
• alignment with internationally recognized standards
• greater confidence for Scope 3 and Product Carbon Footprint projects

Whether companies are calculating Product Carbon Footprints, preparing sustainability reports, or building digital product passports, they can rely on a methodology that has been independently assessed.

‍

Frequently Asked Questions

‍

What does the GUTcert validation confirm?

It confirms that sustamize's Product Footprint Engine uses a suitable and plausible methodology for calculating Product Carbon Footprints in accordance with the Greenhouse Gas Protocol and that the methodology fulfills the requirements assessed under ISO 14064-3.

‍

Which Product Carbon Footprint standard does sustamize follow?

The methodology follows the Greenhouse Gas Protocol – Product Life Cycle Accounting & Reporting Standard using a cradle-to-gate system boundary.

‍

Why is third-party validation important?

Independent validation increases confidence in calculation methodologies by confirming that they are transparent, scientifically sound, and based on recognized standards.

Interested in the details?

The methodology used for the calculation was checked for suitability and plausibility. Feel free to have a closer look at the validation below 👇