Gage Repeatability & Reproducibility (GRR) Studies have become critical in process
improvement projects in the manufacturing sectors. There are various methods to conduct
GRR study. However, the most widely used is the Automotive Industry Action Group
(AIAG) method, which was standardized after the recognition of the importance of
measurement systems. In this study, AIAG method and Wheeler’s method are compared,
with specific interest in the proportions of the estimates of variation.
An experimental study was designed, with factors being the operators and parts. The
spectrum analyzer – Quattro, was tested for its adequacy of measurement and to understand
the variability in the measurement system. In this research, vibration-impact testing was
performed on Stereolithography (SL) parts and the measured feature was the natural
frequency. The data was analyzed following the AIAG method and that proposed by
Wheeler.
From the results obtained, the Repeatability and Reproducibility were over estimated
by AIAG method in comparison to Wheeler’s. The Wheeler’s method gave a better
understanding of the sources of variation. Due to which, the measurement system capability
could be judged without bias. Also, Wheeler’s method helps in making right decisions about
the measurement system. Therefore, Wheeler’s method is strongly recommended over the
AIAG. / Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering.
| Identifer | oai:union.ndltd.org:WICHITA/oai:soar.wichita.edu:10057/3736 |
| Date | 12 1900 |
| Creators | Pandiripalli, Bhavani |
| Contributors | Weheba, Gamal |
| Publisher | Wichita State University |
| Source Sets | Wichita State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
| Format | ix, 48 leaves, ill. |
| Rights | Copyright Bhavani Pandiripalli, 2010. All rights reserved |
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