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Mahmoud Shahrokhi

Mahmoud Shahrokhi

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 34868547400
Faculty: Faculty of Engineering
Address: Department of Industrial Engineering, Room 305
Phone: 09163656344

Research

Title
On the Effect of Measurement Error with Linearly Increasing-Type Variance on Simultaneous Monitoring of Process Mean and Variability
Type
JournalPaper
Keywords
measurement error;MAX-EWMAMS control chart;average run length;simultaneous monitoring;linearly increasing-type variance
Year
2015
Journal QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL
DOI
Researchers Adel Khati Dizabadi ، Mahmoud Shahrokhi ، Mohammad Reza Maleki

Abstract

In most quality control applications, the errors generated from measurement system can adversely affect the ability of control charts in detecting out-of-control conditions. In this paper, the effect of measurement error with linearly increasing-type variance on the performance of maximum exponentially weighted moving average and mean-squared deviation (MAX-EWMAMS) control chart is studied. For this purpose, different out-of-control scenarios including mean shifts, variance shifts, and simultaneous shifts in both are considered, and the detecting performance of the proposed approach is investigated through simulation study. The results of simulation study in terms of three criteria including average run length, standard deviation of run lengths, and the empirical distribution of run lengths prove that the measurement error with linearly increasing-type variance can adversely affect the performance of MAX-EWMAMS control. Copyright © 2015 John Wiley & Sons, Ltd.