ISO
What's New? Labs must MU
In the latest (2012) version of ISO 15189, a few key words were dropped from an important sentence about measurement uncertainty. In previous versions, uncertainty was required "where relevant and possible." In the new version, laboratories don't have a choice. They must calculate measurenment uncertainty, even when irrelevant and impractical. The only certainty now about measurement uncertainty is that ISO has made it a commandment. Thou shalt MU!