I’ve written a lot about how we can determine the uncertainty of a measurement. It is often assumed that our confidence in a measurement equates to our confidence that the product being measured conforms to a specification. Unfortunately, this is not the case. Specifications describing the form of components are usually given as Geometric Dimensions and Tolerances (GD&T). These state that all points on a feature must lie within a given tolerance zone. We can, of course, only measure a …
Source URL: Intrinsic Uncertainty: The Elephant in the Room
Source Website: Advance Engineering – Engineering.com