A method for estimating a future value of a physical quantity of an industrial system, the method comprising the following steps implemented by an estimation device: - for each variable of a plurality of variables of the system, obtaining a sequence of successive measures of the variable, each variable being associated with a normalised variable defined as the ratio of the variable to a reference value, and normalising the sequence of successive measures so as to obtain a sequence of successive measures of the normalised variable, - determining a stability parameter of the system so as to obtain a sequence of successive values of the stability parameter, the stability parameter being a sum weighted by predetermined coefficients of rate of variation of the normalised variables, - identifying a most recent stability time interval in which, for each point of the interval, the stability parameter is less than or equal to a predetermined threshold for a duration greater than or equal to a predetermined duration, - estimating, for a particular variable of the plurality of variables, a part of the sequence of successive measurements of the particular variable, so as to obtain a sequence of successive estimates of the particular variable, a start time of the sequence of successive measurements corresponding to an instant in the time interval, the estimate being carried out by an estimator of the estimation device, - comparing the sequence of successive estimates with the part of the sequence of successive measurements so as to determine a value of an adjustment parameter, the adjustment parameter being configured to be used by the estimator in order to improve the estimate, and - estimating of the future value of the physical quantity of the system by the estimator, based on the value of the adjustment parameter. - for each variable of a plurality of variables of the system, obtaining a sequence of successive measures of the variable, each variable being associated with a normalised variable defined as the ratio of the variable to a reference value, and normalising the sequence of successive measures so as to obtain a sequence of successive measures of the normalised variable, - determining a stability parameter of the system so as to obtain a sequence of successive values of the stability parameter, the stability parameter being a sum weighted by predetermined coefficients of rate of variation of the normalised variables, - identifying a most recent stability time interval in which, for each point of the interval, the stability parameter is less than or equal to a predetermined threshold for a duration greater than or equal to a predetermined duration, - estimating, for a particular variable of the plurality of variables, a part of the sequence of successive measurements of the particular variable, so as to obtain a sequence of successive estimates of the particular variable, a start time of the sequence of successive measurements corresponding to an instant in the time interval, the estimate being carried out by an estimator of the estimation device, - comparing the sequence of successive estimates with the part of the sequence of successive measurements so as to determine a value of an adjustment parameter, the adjustment parameter being configured to be used by the estimator in order to improve the estimate, and - estimating of the future value of the physical quantity of the system by the estimator, based on the value of the adjustment parameter.