Out-of-Control Signals in Three-Part Compositional T2 Control Chart


Interpretation of out-of-control signals in multivariate control charts is a persistent problem. Identifying the variables contributing to the signal is of crucial importance for process control. Both procedures turn out to be more complicated when observations are compositions (variables adding to a constant sum). Compositional T control chart (TC ) is… (More)
DOI: 10.1002/qre.1583


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