Patent ID: 8306648

Claim:
A process control device comprising: a tracking control unit that receives event information, transmitted from the passing signal transmission device, notifying that a product being produced in a production line including a plurality of zones each comprising a production process passes a predetermined location, the event information including an ID of the product and controls a status of current location and sequence order of the product on the basis of the event information transmitted from the passing signal transmission device, wherein the sequence order is controlled for each of the zones; a conductor unit that determines a process that corresponds to the ID of the product in the event information received by the tracking control unit and generates a request for performing the determined process; a work instruction unit that issues the work instruction for the product being produced in the production line in response to the request from the conductor unit; a work instruction past record control unit that controls past record of the work instructions in response to an issue of the work instruction by the work instruction unit; a work instruction sequence order control unit that controls a sequence order of the work instructions issued by the work instruction unit in either order of the status of sequence order of the product or a status different from the status of sequence order of the product; a work instruction sequence order storage unit that stores information of the sequence order of the work instructions, wherein the work instruction sequence order control unit controls the work instruction sequence order storage unit; and a reissue requesting device that transmits event information that notifies a reissue request for reissuing the work instruction in response to the user, wherein the tracking control unit receives event information transmitted from the reissue requesting device, and generates a reissue request for the reissue to the work instruction unit, wherein the work instruction unit reissues the work instruction in response to the reissue request with reference to information of the sequence order of the work instructions in the work instruction sequence order storage unit.