40th International Conference on Production Engineering of Serbia
ICPES 2025
Nis, Serbia, 18-19th september 2025
ANALYSIS OF MEASUREMENT SYSTEM CAPABILITY WITH NEGLIGIBLE OPERATOR INFLUENCE: A CASE STUDY USING A COORDINATE MEASURING MACHINE
Predrag Jankovic, Miloš Madic
DOI: 10.46793/ICPES25.489J
In modern industrial metrology, the ability to assess the reliability and precision of measurement systems is of critical importance. This study presents a measurement system analysis (MSA) focused on scenarios where operator influence is negligible, particularly applicable when using coordinate measuring machines (CMMs) operating in automated or highly standardized conditions. Unlike classical GRR (Gage Repeatability and Reproducibility) studies that assess both repeatability and reproducibility — often require multiple operators — this approach isolates repeatability as the dominant component of measurement variation.The experimental part of the research was conducted using a CNC-controlled CMM to measure key dimensional characteristics on a series of precision-machined cylindrical parts. A fixed measurement program was used to eliminate variability due to operator actions. Statistical analysis included repeatability studies, calculation of %GRR, and evaluation of measurement system capability indexes (such as P/T ratio)
Product quality, Measurement system analysis, GR&R, CMM
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