This is the heart of the document. Guide 98-4 outlines how to create decision rules for conformity assessment. It defines how to set acceptance zones and rejection zones based on the tolerance limits and the measurement uncertainty.

Clearly establish the upper and lower specification limits (USL and LSL) for the device or product under test.

It applies to:

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| | Details | |-------------|--------------| | Full title | ISO/IEC Guide 98-4:2012 – Uncertainty of measurement – Part 4: Role of measurement uncertainty in conformity assessment | | Year of publication | 2012 (current version) | | Number of pages | ~30 | | Main audience | Quality managers, metrologists, calibration labs, regulatory bodies | | Key output | Decision rules for pass/fail with known risks |

The role of measurement uncertainty in conformity assessment