Fuzzy handling of measurement errors in instrumentation

This paper focuses on the use of the possibility theory and of the fuzzy subset theory to deal with the imprecision and/or uncertainty of the information handled in measurement systems. Methods are described: for building fuzzy subsets from numerical data coming from "physical" sensors on the one hand, and handling approximate estimations provided by "human" sensors on the other hand. The propagation of the fuzzy representation of acquired measures in further treatments, such as those involved in performance indicators, is also considered.