Guidance

Simple guide to CHPQA uncertainty

Simple guide to CHPQA uncertainty, covering definitions and how it is determined.

• From: Department for Energy Security and Net Zero
• Published: 1 September 2021
• Last updated: 26 March 2026 — See all updates

Documents

Simple guide to CHPQA uncertainty

PDF, 882 KB, 11 pages

Details

This is a simple guide to CHPQA uncertainty covering the definition of uncertainty and how it is determined, the CHPQA ‘best practice’ uncertainties, and how to deal with excess uncertainty.

Published 1 September 2021

Last updated 26 March 2026 + show all updates

1. 26 March 2026

   Updated 2026 to align with the CHPQA Portal now hosted on GOV.UK.

2. 1 September 2021

   First published.