JSM 2012 Home

JSM 2012 Online Program

The views expressed here are those of the individual authors and not necessarily those of the JSM sponsors, their officers, or their staff.

Online Program Home

Abstract Details

Activity Number: 239
Type: Contributed
Date/Time: Monday, July 30, 2012 : 2:00 PM to 3:50 PM
Sponsor: Quality and Productivity Section
Abstract - #304331
Title: GLR Charts for Monitoring Multiple Proportions
Author(s): Jaeheon Lee*+ and Ning Wang and Yiming Peng and Lei Sun and Marion R. Reynolds, Jr.
Companies: Chung-Ang University and Virginia Tech and Virginia Tech and Virginia Tech and Virginia Tech
Address: Dept. of Statistics, Seoul 156-756, , South Korea
Keywords: Average Run Length ; Generalized Likelihood Ratio Chart ; Multinomial Distribution ; Multiple Categories ; Statistical Process Control

This paper develops a multinomial generalized likelihood ratio (GLR) chart for detecting shifts in category probabilities. This chart can be used when all items from the process are inspected and classified into more than two categories. It is shown that the multinomial GLR chart has a very significant advantage relative to some other charts when the direction of the out-of-control shift in the parameter vector can not be specified. Some charts such as the multinomial cumulative (CUSUM) chart give a good performance when the shifts in parameters can be specified, but give a very poor performance when the shifts are not in anticipated directions or the shift direction is unknown. Because there may not be too many applications with multiple categories where the shifts in parameters can be specified or there is only one specific direction of interest, the multinomial GLR chart provides a ve

The address information is for the authors that have a + after their name.
Authors who are presenting talks have a * after their name.

Back to the full JSM 2012 program

2012 JSM Online Program Home

For information, contact jsm@amstat.org or phone (888) 231-3473.

If you have questions about the Continuing Education program, please contact the Education Department.