Multiattribute control charts have been widely found to be more effective process control than separate uniattribute control charts in different applications. Based on an available statistical model which was developed for designing multiattribute np (Mnp) chart, in this study we proposed a multiattribute Exponentially Weighted Moving Average (MEWMA) chart. We also compared the MEWMA chart with the optimal version of the (Mnp) chart. The comparison results indicate that the proposed MEWMA chart outperforms the Mnp chart by about 65% in terms of the average number of defectives.
Quality Control and Management
Design of multiattribute EWMA chart
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