McMaster University

Graduate Program in Statistics



STATISTICS SEMINAR



SPEAKER:
Roman Viveros-Aguilera
Department of Mathematics and Statistics
McMaster University.
Date :Wednesday March 12, 2003.
Time : 3:30pm
Address Burke Science Building
Room: 138
TITLE:
CUSCORE Charts and Their Application to Monitoring a Sawing Process
ABSTRACT:
CUSCORE charts were introduced by Box and Ramirez (1992) as tools directed to detecting the presence of specific disturbances feared in advance in a process. Thus different charts could be used in a given application depending on how many different problems one wishes to keep a close eye on. Industrial applications were the first ones in mind but the methods apply to any other processes, e.g. services, administration, etc. From a methodological perspective, the charts can be seen as the cumulative sums of Fisher's score statistics. In this talk, we discuss the ideas behind the charts, their inner workings and their optimality under a plausible criterion. We illustrate their use in monitoring a sawing process from the lumber industry where one is interested in detecting specific sawing defects such as chipper marks, roll marks, wane and bandsaw marks. A dataset provided by the Faculty of Forestry at UBC will be used for illustration.

Part of the work was done jointly with Alberto Ferrer and Yongmin Yu.

About the Speaker
Roman Viveros-Aguilera is a professor of statistics in the Department of Mathematics and Statistics at McMaster University. He obtained a bachelor in mathematics from Universidad Veracruzana (Mexico), a master in mathematics from the Center for research and Advances Studies (Mexico) and a PhD in statistics from University of Waterloo. He is interested in statististical inference, industrial statistics and applications. Currently, he is the editor of Liason, the quarterly information bulletin of the Statistical Society of Canada.
References


Department of Mathematics and Statistics
Graduate Program in Statistics

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Last updated on March 5, 2003