Abstract: A method for determining a measured variable comprises the following steps: a) providing a data record comprising values of a plurality of input variables and values of the measured variable; b) ascertaining correlations between the values of the input variables and the values of the measured variable; c) creating a sensor model on the basis of the ascertained correlations; d) acquiring at least one further value of at least one of the input variables; and e) determining a value of the measured variable on the basis of the at least one further value of at least one of the input variables and the sensor model wherein the values of at least one of the input variables in steps a) and/or e) have been determined, in turn, according to steps a) to e). Further, a sensor system and a gas turbine engine are provided.