QEHSQuality
Gauge R&RGR&R
Gauge Repeatability and Reproducibility — a measurement system analysis that quantifies how much variation comes from the measurement tool, the operator, and the part.
Gauge R&R is part of Measurement System Analysis (MSA) required by IATF 16949. Repeatability is the variation when the same operator measures the same part with the same gauge repeatedly. Reproducibility is the variation between different operators measuring the same parts. Total GR&R below 10% is excellent; below 20% is acceptable; above 30% requires corrective action. A high GR&R means the measurement system cannot distinguish between good and bad parts, making process control impossible.