A numerical control device includes an NC program storing unit, a parameter change unit configured to change parameter based on parameter change operation by an operator, a parameter change monitoring unit configured to detect change of the parameter by monitoring the parameter change unit and output command for starting the NC program based on the change of the parameter, and an NC program execution unit configured to execute the NC program based on command from the parameter change monitoring unit.

For an improved management of a postprocessor, for machining with a machine tool, a computer-implemented method includes providing toolpath data for machining a workpiece with a tool along a corresponding toolpath. The tool is comprised by a machine tool that is numerically controlled by a control device. Sample machine code is provided. Atrial postprocessor software component for determining machine code using toolpath data is provided. Trial machine code is determined using the trial postprocessor software component and the toolpath data. A sample code architecture of the sample machine code and a trial code architecture of the trial machine code are determined. Characteristics of the sample machine code are determined by comparing the sample code architecture with the trial code architecture, and a new postprocessor software component is determined by incorporating the characteristics into the trial postprocessor software component.