Calibration is not just about having stickers on your equipment with dates that say everything is okay.

My journey in dimensional inspection and quality started what seems like a lifetime ago when I ran the one-CMM quality department in my father’s aerospace engineering firm. Thirty years later, my passion for American ingenuity has never been stronger.

Like any other commercial enterprise, calibration laboratories cannot be all things to all people.

Before I get into hand-to-hand combat on this gentle reader, I thought it might be helpful to explain a few things about what uncertainty is, and what it is not.

I regularly take shots at quality auditors for some of their antics but thought that, in the interest of fairness, it was time to turn my sights on issuers of calibration reports for some of their antics.

This question is rarely, if ever, asked but assumptions regarding the length of time involved regularly pop up, especially when measurement disputes are the situation into which such assumptions are injected.