AUTOMATIC WIRING METHOD

PURPOSE:To surely reduce the number of unfinished wiring by performing rewiring by changing the wiring information of the unwired part when unwired part is produced due to the unsuitability of the wiring information for wiring. CONSTITUTION:Initial automatic wiring is performed by using a labyrinth method in Step S1. Then unwired parts are extracted in Step S2 and the presence/absence of the unwired parts is discriminated in Step S3. When the presence of an unwired part is recognized in Step S3, the wiring route found in Step S2 and the arrangement information of parts and pins of the initial automatic wiring made in Step S1 are stored in Step S4. In Step S5, changes in arrangement of pins, gates, or parts or combined changes of the pins, gates, and parts are performed. In Step S7, automatic wiring is again performed to the wiring routes and unwired routes of the part deleted in Step S6. Then whether or not the wired results in Step S7 are better than the results of the initial wiring in the Step 1 is discriminated in Step S8. When the rewired results are better than the results of the initial wiring, the wiring route and arrangement information of the parts and pins are updated in Step S9.