Variation source identification is a critical step in the quality and productivity improvement of manufacturing processes and draws significant attention recently. In this article we present a robust pattern-matching technique for variation source identification. In this paper, a multiple variation sources identification technique is developed by adopting the linear relationship between variation sources and product quality characteristics, which is described by a coefficient matrix. The columns of the coefficient matrix are treated as the signatures of corresponding variation sources. The matching is conducted between the signature vectors and the eigenvectors of the sample covariance matrix of the product quality measurements. Multiple faults are allowed in the matching. Further, both the perturbation of unstructured noise and the sample uncertainties are considered in this matching method. A comprehensive case study illustrates the effectiveness of this method. This robust method can be used for root cause identification of manufacturing processes. The application of this method can significantly reduce the troubleshooting time and hence improve the quality and productivity of manufacturing processes.
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e-mail: szhou@engr.wisc.edu
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February 2006
Technical Papers
Robust Method of Multiple Variation Sources Identification in Manufacturing Processes For Quality Improvement
Zhiguo Li,
Zhiguo Li
Graduate Student
Department of Industrial and Systems Engineering,
University of Wisconsin
, Madison, WI 53706
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Shiyu Zhou
Shiyu Zhou
Assistant Professor
Department of Industrial and Systems Engineering,
e-mail: szhou@engr.wisc.edu
University of Wisconsin
, Madison, WI 53706
Search for other works by this author on:
Zhiguo Li
Graduate Student
Department of Industrial and Systems Engineering,
University of Wisconsin
, Madison, WI 53706
Shiyu Zhou
Assistant Professor
Department of Industrial and Systems Engineering,
University of Wisconsin
, Madison, WI 53706e-mail: szhou@engr.wisc.edu
J. Manuf. Sci. Eng. Feb 2006, 128(1): 326-336 (11 pages)
Published Online: July 21, 2005
Article history
Received:
August 25, 2004
Revised:
July 21, 2005
Citation
Li, Z., and Zhou, S. (July 21, 2005). "Robust Method of Multiple Variation Sources Identification in Manufacturing Processes For Quality Improvement." ASME. J. Manuf. Sci. Eng. February 2006; 128(1): 326–336. https://doi.org/10.1115/1.2117447
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