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Root cause analysis of manufacturing variation from optical scanning data

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  • Anh Tuan Bui

    (Virginia Commonwealth University)

Abstract

Identifying the root causes of part-to-part variation is a central problem in most six-sigma programs, especially of modern manufacturing processes. This is challenging as the sources and patterns of the variation are often unknown or previously unidentified. A small literature aims to address this problem by discovering unknown, previously unidentified variation sources, in a manner that helps understand their nature, from only a sample of measurement data. However, the common solution of this literature is unideal for this objective in terms of both methodology and metrology aspects. This paper proposes a convolutional generative modeling framework for optical scanning data to address this limitation. The proposed approach can correctly discover the true variation sources and visualize their individual patterns in two manufacturing examples, without any prior knowledge of the variation. The approach also outperforms state-of-the-art methods in these examples.

Suggested Citation

  • Anh Tuan Bui, 2024. "Root cause analysis of manufacturing variation from optical scanning data," Annals of Operations Research, Springer, vol. 339(1), pages 111-130, August.
    • Handle: RePEc:spr:annopr:v:339:y:2024:i:1:d:10.1007_s10479-022-05077-5
    DOI: 10.1007/s10479-022-05077-5
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    References listed on IDEAS

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