Directional Control Schemes for Multivariate Categorical Processes

• Autores: Jian Li, Fugee Tsung, Changliang Zou
• Localización: Journal of quality technology: A quarterly journal of methods applications and related topics, ISSN 0022-4065, Vol. 44, Nº. 2, 2012, págs. 136-154
• Idioma: inglés
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• Resumen

  • The authors propose a simple Phase II log-linear directional control chart exploiting directional shift information and integrating multivariate categorical process monitoring into multivariate binomial and multinomial distributions. They propose a diagnostic scheme for identifying shift direction. The effectiveness of the control chart and the overall diagnostic approach are demonstrated through numerical simulations and real applications.