# Quality Assurance and Oversight | Compute methodology
Source: https://greenpixie.com/docs/methodology/cloud-compute/quality-assurance

Standards alignment, validation, and review controls.

## 9.1 Standards Alignment [#91-standards-alignment]

The methodology is aligned to the GHG Protocol and prepared with reference to ISO 14064-1. It forms part of the [*Greenpixie Methodology for Cloud Emission Measurement*](/methodology/cloud).

## 9.2 Data Source Verification [#92-data-source-verification]

Greenpixie records against each figure the document it was read from and the date it was read. Where a source is republished or a cloud provider changes a specification page, Greenpixie re-reads it and records the change.

## 9.3 Internal Review [#93-internal-review]

Any change to the processor matching logic, the memory module power reference, the drive power reference, or the operating point is reviewed by Greenpixie before release. Greenpixie records the direction and size of the resulting change to published figures.