1. A method for operating a controlling system, the method which comprises: acting, with a controller of a controlling system, on a controlled system by using a manipulated variable, the controller acting in dependence of a plurality of controller parameters; determining a response characteristic of the controlled system during operation of the controller by comparing a wavelet transformation of a temporal response of the manipulated variable with a wavelet transformation of a temporal response of a controlled variable of the controller in a given time window; ascertaining respective instants assigned to the wavelet transformation of the temporal response of the manipulated variable and to the wavelet transformation of the temporal response of the controlled variable; and setting at least one of the controller parameters as a function of the response characteristic.