Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories (IPCC Good Practice Guidance) provides a set of procedures intended to ensure that greenhouse gas inventories are accurate in the sense that they are systematically "neither over nor underestimates so far as can be judged, and that uncertainties are reduced so far as possible."

To this end, it supports the development of inventories that are transparent, documented, consistent over time, complete, comparable, assessed for uncertainties, subject to quality control and quality assurance, and efficient in the use of resources.

The IPCC Good Practice Guidance includes guidance on choice of estimation methods appropriate to national circumstances, quality assurance and quality control at the national level, quantification of uncertainties, and data archiving and reporting to promote transparency.

The IPCC Good Practice Guidance does not replace the Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories. However, in reality it does include multiple corrections, new methodologies, new cross-cutting requirements, and updated default data.

You should familiarize yourself with IPCC Good Practice Guidance, focusing on the cross-cutting chapters (Chapter 6-Quantifying Uncertainties in Practice, Chapter 7-Methodological Choice and Recalculation, Chapter 8-Quality Assurance and Quality Control) and the Sectoral chapters relevant to your expertise.