SIST EN ISO 80000-11:2020/A1:2026

Overview

SIST EN ISO 80000-11:2020/A1:2026, titled Quantities and Units - Part 11: Characteristic Numbers - Amendment 1, is an important update to the international standard ISO 80000-11:2019. Prepared by the International Organization for Standardization (ISO) Technical Committee ISO/TC 12 in collaboration with CEN, this amendment refines the framework for defining and using characteristic numbers in science and engineering. Officially approved by the European Committee for Standardization (CEN) in December 2024, this amendment is set for implementation across CEN member states by February 2026.