Synthetic charts to control bivariate processes with autocorrelated data

• Autor(a) principal: Simões, Felipe Domingues [UNESP]
• Data de Publicação: 2016
• Outros Autores: Leoni, Roberto Campos [UNESP], MacHado, Marcela Aparecida Guerreiro [UNESP], Costa, Antonio Fernando Branco [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.cie.2016.04.005; http://hdl.handle.net/11449/177985
• topic: Bivariate process; Side-sensitive; Steady state; Synthetic; X charts

In this study, we propose the use of simultaneous Xcharts to control bivariate processes with autocorrelated data. The first set of Xcharts is side-sensitive with regard to the same variable (SV Xcharts) and the second one is side-sensitive with regard to both variables (BV Xcharts). The Markov chain approach was used to obtain the steady-state properties of the Xcharts. In comparison with the standard synthetic T2 chart, the SV and the BV charts signal faster in a wide variety of disturbances, except when the variables are high correlated. The BV charts are simpler and signal faster than the SV charts.