3. The method according to claim 1 , wherein the validity condition of said active classifier is evaluated as a function of the mean value and of a variance value of the plurality of input signals pertaining to said component.
3. The method according to claim 1 , wherein the validity condition of said active classifier is evaluated as a function of the mean value and of a variance value of the plurality of input signals pertaining to said component. 4. The method according to claim 3 , wherein said validity condition is satisfied if an absolute value of a difference between the original variance of the signals pertaining to a regular functioning of said component and the variance of the signals calculated using the most recent relevant signals pertaining to a regular functioning of said component is lower than a minimum drift threshold or higher than a maximum drift threshold.