Method for operating machine tool and/or production machine

The invention relates to a method for operating a machine tool and/or a production machine (1), comprising the following steps: comparing at least one target position value (X target, Y target, Z target, A target, C target) of a machine axis (A, B, C, X, Y, Z) and/or a tool center point (61) with an actual position value (X actual, Y actual, Z actual, A actual, C actual), and/or-comparing at least one target speed of the machine axis and/or the tool center point (61) with the actual speed and/or-comparing at least one target acceleration of the machine axis and/or the tool center point (61) with the actual acceleration,-forming at least one actual mass value (Gactual) on the basis of one or more of the comparisons, -comparing the target mass value (Gtarget) with an actual mass value,-reducing the feed speed (Fmax) and/or acceleration (amax) and/or jerk (rmax) of the machine axis (A, B, C, X, Y, Z) and/or of the tool center point if a defined deviation (Ad) of the actual mass value (Gtarget) exceeds the target