Method for controlling a gap minimization of an adjustable gap between a rotor and a housing of a gas turbine, wherein the gas turbine comprises a gap-adjusting device, in particular a hydraulic gap-adjusting device, characterized by the following steps: - with the aid of a simulation program, the operation of the gas turbine with different parameter settings is modeled and a simulation data set is prepared which contains the dependence of the gap size on an operating parameter, - on the basis of the simulation data set, a lower threshold (P U ) and an upper threshold (P O ) for the operating parameter are specified, - furthermore, for a transition region (M) between the lower threshold (P U ) and the upper threshold (P O ), a correlation (F) between the operating parameter and a maximum value (P MAX ) of the operating parameter is extracted from the simulation data set, - during operation of the gas turbine, an actual value (P I ) of the operating parameter is continuously determined and compared with the lower threshold (P U ) and the upper threshold (P O ) , - and the maximum value (P MAX ) of the actual value (P I ) is determined over a specified time period, wherein, in the comparison of the actual value (P I ) with the lower threshold (P U ) and the upper threshold (P O ), if the actual value (P I ): - lies below the lower threshold (P U ), the gap minimization is deactivated, - lies above the upper threshold (P O ), the gap minimization is activated, - lies in the transition region (M), a limit value (P G ) for the operating parameter is determined with the aid of the maximum value (P MAX ) from the specified time period using the correlation (F) and the gap minimization is activated if the actual value (P I ) lies above the limit value (P G ) and is deactivated if the actual value (P I ) lies below the limit value (P G ) . - with the aid of a simulation program, the operation of the gas turbine with different parameter settings is modeled and a simulation data set is prepared which contains the dependence of the gap size on an operating parameter, - on the basis of the simulation data set, a lower threshold (P U ) and an upper threshold (P O ) for the operating parameter are specified, - furthermore, for a transition region (M) between the lower threshold (P U ) and the upper threshold (P O ), a correlation (F) between the operating parameter and a maximum value (P MAX ) of the operating parameter is extracted from the simulation data set, - during operation of the gas turbine, an actual value (P I ) of the operating parameter is continuously determined and compared with the lower threshold (P U ) and the upper threshold (P O ) , - and the maximum value (P MAX ) of the actual value (P I ) is determined over a specified time period, - lies below the lower threshold (P U ), the gap minimization is deactivated, - lies above the upper threshold (P O ), the gap minimization is activated, - lies in the transition region (M), a limit value (P G ) for the operating parameter is determined with the aid of the maximum value (P MAX ) from the specified time period using the correlation (F) and the gap minimization is activated if the actual value (P I ) lies above the limit value (P G ) and is deactivated if the actual value (P I ) lies below the limit value (P G ) . <EOS>