NC PROGRAM EDITING METHOD

PURPOSE:To facilitate the editing job and to improve the production efficiency of an NC program by displaying an image including the electronic parts on a circuit base board in an assignment state and selecting the electronic parts out of the displayed image to change the assignment state. CONSTITUTION:The images of electronic parts 2 are drawn on a circuit base board 1, and the parts 2 of the oblique lines are selected by a pointing device 8. When the parts of the oblique lines are assigned again to a loaded machine M2 among those parts 2 assigned to a loaded machine M1, the image of the board 1 of the machine M1 changes to the state of the right diagram from that of the left diagram of (a). Meanwhile the image of the board 1 of the machine M2 changes to the state of the right diagram from that of the left diagram of (b). Furthermore the total loading time (tact) of the parts 2 is shown under the image of the board 1 in a graph. Thus the assignment result can be confirmed by a worker. Then the worker can easily assign the parts 2 so as to average the job of the loaded machines by carrying out the preceding jobs in several times.