Sustainability metric estimation uncertainty
A sustainability metric may depend on incomplete activity data, estimation factors, model choices or uncertain future conditions. The practitioner considers whether the measurement method and assumptions fit the criteria, whether data are reliable and complete, and whether uncertainty and limitations are adequately disclosed. The work and conclusion depend on the engagement’s assurance level and applicable requirements.
Worked example
A company estimates vehicle emissions from fuel use and an emissions factor. The practitioner checks fuel records, the appropriateness of the factor and whether missing data and estimation limitations are explained.
Common mistake
Do not treat a number with several decimal places as precise evidence, or confuse inherent estimation uncertainty with a proven misstatement.
Where it appears in your exams
| Qualification | Exam | Relationship | Period |
|---|---|---|---|
| ACCA | AAA (INT) | Direct | September 2026–June 2027 |