Control chart for multivariate attribute processes

摘要

Many industrial processes are multivariate in nature since the quality of a product depends on more than one variable. Multivariate control procedures can be used to capture the relationship between the variables and to provide more sensitive control than that provided by the application of univariate control procedures on each variable. Much has been done on the multivariate variable processes, such as embodied in control procedures based on Hotelling's T~2 statistic. However, little work has been done to deal with the control of multivaraite attribute processes, which is very important in practical production processes.