Re: IATF 16949 Cl. 7.1.5.2.1 - Gauges (Measuring Jigs) Calibration/Verification Recor
Looking at this I would say that two issues are being confused here.
7.1.5.2.1.f) is a requirement that the calibration record states conformity to the specification (in or out of tolerance) after calibration. I am pretty sure your calibration certificates include that.
As for how to handle the measurement uncertainty in determining the conformity, that is what is called a "decision rule". ISO 17025 covers that calibrations for IATF 16949, and that states in 5.10.4.2:
"When statements of compliance are made, the uncertainty of measurement shall be taken into account."
Therefore, the calibration determination of in / out of tolerance should already take measurement uncertainty into account by the calibration lab.
Concerning whether or not the gauge is suitable for use, that would be better covered in IATF 16949 7.1.5.1.a):
"The organization shall ensure that the resources provided:
a) are suitable for the specific type of monitoring and measurement activities being undertaken"
Therefore when a tool is chosen for a particular measurement the measurement uncertainty of the calibration must be accounted for to assure the tool is "suitable". In most cases the measurement uncertainty is small and will not be a significant contributor. In some cases it can be very significant. Here is an example:
A digital caliper is used in measuring a test jig. The tolerance for the measurement is 10.000 ±0.005 in. You use a caliper with 0.001 resolution, thinking it should be good enough. The specification for the caliper is ±0.002 in, and the measurement uncertainty on the certificate is 710 µin (or 0.00071 in). You need to add the uncertainty to the tolerance so the uncertainty is "taken into account" (± 0.00271 in), and thus determine if the tool is "suitable for use".
A challenge in complying with this finding is determining what your organization's rule is for "suitable for use" (a 4:1 or a 10:1 ratio rule is typical). It needs to include the measurement uncertainty to be valid.