On the construction of control charts using linguistic variables
JYH-HONE WANG, Tzvi Raz · International Journal of Production Research · 1990
SUMMARY This paper studies two approaches to constructing control charts for linguistic data. Linguistic data can provide more information than the binary classification used in control charts by attributes. A generic approach for constructing attribute control charts using linguistic data is described. Several methods for calculating the values representing sample means, and for determining the centre line and the control limits are presented.