F. Franceschini et D. Romano, Control chart for linguistic variables: a method based on the use of linguistic quantifiers, INT J PROD, 37(16), 1999, pp. 3791-3801
The paper presents a method for conducting the online control of a producti
on process using control charts based on linguistic variables. The novelty
of the method consists of the analysis of sample data without superimposing
an arbitrary numerical conversion. An example application is also develope
d.