Title: Design of general-purpose sampling strategies for geometric shape measurement

Authors: Ester Gutierrez, Bianca Maria Colosimo, Quirico Semeraro, Luis Onieva

Addresses: Department of Industrial Management, Universidad de Sevilla, Escuela Superior de Ingenieros, Camino de los Descubrimientos s/n, Isla de la Cartuja 41092 Sevilla, Spain. ' Dipartimento di Meccanica, Politecnico di Milano, Via La Masa, 1 – 20156 Milano, Italy. ' Dipartimento di Meccanica, Politecnico di Milano, Via La Masa, 1 – 20156 Milano, Italy. ' Department of Industrial Management, Universidad de Sevilla, Escuela Superior de Ingenieros, Camino de los Descubrimientos s/n, Isla de la Cartuja 41092 Sevilla, Spain

Abstract: Quality inspection is a preliminary step for different further analyses (process monitoring, control and optimisation) and requires one to select a measuring strategy, i.e., number and location of measurement points. This phase of data gathering usually impacts on inspection times and costs (via sample size) but it also affects the performance of the following tasks (process monitoring, control and optimisation). While most of the approaches for sampling design are specifically presented with reference to a target application (namely, monitoring, control or optimisation), this paper presents a general-purpose procedure, where the number and location of measurement points are selected in order to retain most of the information related to the feature under study. The procedure is based on principal component analysis and its application is shown with reference to a real case study concerning the left front window of a car. A different approach based on multidimensional scaling is further applied as validation tool, in order to show the effectiveness of the PCA solution.

Keywords: quality inspection; data reduction; multidimensional scaling; MDS; principal component analysis; PCA; cluster analysis; sampling strategies; geometric shape measurement.

DOI: 10.1504/IJPSE.2011.038945

International Journal of Process Systems Engineering, 2011 Vol.1 No.2, pp.184 - 196

Published online: 14 Jan 2015 *

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