Abstract #301529

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JSM 2002 Abstract #301529
Activity Number: 321
Type: Contributed
Date/Time: Wednesday, August 14, 2002 : 12:00 PM to 1:50 PM
Sponsor: Section on Physical & Engineering Sciences*
Abstract - #301529
Title: EWMA Charts and Measurement Error
Author(s): John Panaretos*+ and Petros Maravelakis and Stelios Psarakis
Affiliation(s): Athens University of Economics & Business and Athens University of Economics & Business and Athens University of Economics & Business
Address: 76, Patision St.,, Athen, International, 153 42, GREECE
Keywords: EWMA ; Control Charts ; Measurement Error ; Statistical Process Control
Abstract:

Measurement error is a usually met distortion factor in real world applications that influences the outcome of a process. In this paper, we examine the effect of measurement error on the ability of the EWMA control chart to detect out of control situations. The model used is the one involving linear covariates. We investigate the ability of the EWMA chart in both the cases of shifts in mean and in variance. We prove that, under such type of error, the performance of the chart regarding the mean and the variance is significantly affected.

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Revised March 2002