Abstract: The controller according to the invention is a controller for optimizing the leveling process (leveling) of an elevator car at a stopping point for an elevator having an elevator controller which controls the stop of the car at a stopping point as a function of a specified distance X to the stopping point, wherein the controller is designed, during each of at least two, in particular at least three journeys, to record a set of at least one same measured value, to determine a change dX or a changed distance X? as a function of the set of the current journey and at least one past journey and to output the changed value X? or the difference dX to the specified distance X.