Fuzzy handling of measurement errors in instrumentation

This paper focuses on the use of the possibility theory and of the fuzzy su bset theory to deal with the uncertainty of the measurements handled in ins trumentation systems, Methods are described for building fuzzy subsets from numerical data coming from imprecise "physical" sensors on the one hand, a nd handling approximate estimations provided by "human" sensors on the othe r hand. The propagation of the fuzzy representation of acquired measures in further treatments, such as those involved in performance indicators aimed at controlling manufacturing production, is also considered.