Intrinsic Uncertainty: The Elephant in the Room

It’s often assumed that confidence in a measurement equates to confidence a product conforms. However, we can only measure at discrete points on a surface, while GD&T relates to the entire surface. We don’t know what is happening on the surface between the measured points. This is known as the intrinsic uncertainty of the measurand. In this article, I look at some of the approaches currently being used to deal with it, as well as how it may finally be solved. Read the full article published on engineering.com