Statistical performance of control charts with variable parameters for autocorrelated processes

Oviedo-Trespalacios, Óscar & Peñabaena-Niebles, Rita (2016) Statistical performance of control charts with variable parameters for autocorrelated processes. DYNA, 83(197), pp. 120-128.

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Chemical process and automation of data collection for industrial processes are known to result in auto-correlated data. The independence of observations is a basic assumption made by traditional tools that are used for the statistical monitoring of processes. If this is not adhered to then the number of false alarms and quality costs are increased. This research considers the use of variable parameters (VP) charts in the presence of autocorrelation. The objective is to determine the impact on the detection velocity and false alarms of different degrees of autocorrelation and their interaction with process conditions—the aim being to effectively select parameters. The VP chart showed improvements in its performance when detecting large average runs as the autocorrelation coefficient increased in contrast with the traditional variable sample interval (VSI) and x quality systems. This research demonstrates the superiority of variable parameters quality monitoring architectures over traditional statistical process monitoring tools.

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ID Code: 96398
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Autocorrelation, Quality, Simulation, Statistical quality monitoring, Variable parameters control charts
DOI: 10.15446/dyna.v83n197.49346
ISSN: 00127353
Divisions: Current > Research Centres > Centre for Accident Research & Road Safety - Qld (CARRS-Q)
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Psychology & Counselling
Copyright Owner: Copyright 2016 The author; licensee Universidad Nacional de Colombia
Copyright Statement: This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License
Deposited On: 28 Jun 2016 23:06
Last Modified: 12 Jul 2016 00:57

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