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Robust Monitoring of an Industrial IT System in the Presence of Structural Change
Author(s) -
Padonou Esperan,
Roustant Olivier,
Lutz Michel
Publication year - 2015
Publication title -
quality and reliability engineering international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 62
eISSN - 1099-1638
pISSN - 0748-8017
DOI - 10.1002/qre.1651
Subject(s) - outlier , univariate , industrial production , scope (computer science) , computer science , smoothing , industrial equipment , anomaly detection , data mining , multivariate statistics , industrial engineering , reliability engineering , engineering , artificial intelligence , machine learning , keynesian economics , economics , computer vision , programming language
This paper presents original research initiated by the monitoring needs of a semiconductor production plant. The industrial operations rely on an Information Technology (IT) system, and several time series data are controlled statistically. Unfortunately, these variables often contain outliers, as well as structural changes because of external decisions in the IT activity. As a consequence, it has been observed that the monitoring results obtained with standard techniques could be severely biased. This paper attempts to overcome such difficulties. A new monitoring method is proposed, based on robust Holt–Winters smoothing algorithm, and coupled with a relearning procedure for structural break detection. Such a method is flexible enough for a large‐scale industrial application. We evaluate performance through simulation and show its usefulness in real industrial applications for univariate and multivariate time series. The scope of application deals with IT activity monitoring, but the introduced statistical methods are generic enough for being used in other industrial fields. Copyright © 2014 John Wiley & Sons, Ltd.