I hope I can explain this adequately.

To the best of my knowledge, according to ASME standards, when measuring a diameter, every point on that diameter needs to fall within the drawings stated tolerance. If you have a diameter that is out of round, some areas of the diameter could fall outside the upper or lower limits of the tolerance. When the part diameters have a loose tolerance, it's not so big of a deal, but when I have part diameters that have a tight tolerance, I want to make sure no points fall outside of the minimum and maximum tolerance. (I am guilty of leaving diameters on least squares most of the time).

My thinking was, if measuring an ID, I could get what I want by measuring max inscribed and then reporting from the low end of the tolerance with + tolerance, but no - tolerance, and reporting circularity along with the size would flag any points outside of tolerance, but then thought I could have a situation where the size was in tolerance but circularity would be falsely flagging a diameter bad.

Assuming I explained my dilemma correctly, how do you report in order to best capture those kind of discrepancies?