Abstract: A method for detecting an error in an assembly, in particular, an assembly of a flying object, with the assembly being defined by at least one parameter. The method comprises detecting of several values of the parameter at several points of time and/or on several measuring points, grouping the values of the parameter in several groups, determining of the number of values in a group and triggering an error signal if the number of values in at least one group is not congruent with a predetermined range of numbers. Also, a detector device for detecting an error in an assembly, as well as a flying object provided with an assembly and such a detector device, can perform operations similar to the method.