Next, the operations of the mounting machines M1 to M3 after the component is replenished will be briefly described. When the component mounting operation is repeatedly performed, the control unit 17 detects that the carrier tape 15 has been switched. When the component is replenished by the tape splicing method, the control unit 17 determines that the carrier tape 15 has been switched by detecting the splice of the carrier tape 15. When the component is replenished by the splicing-less method, the control unit 17 determines that the carrier tape 15 has been switched when the carrier tape 15 after the replenishment has been detected.

Subsequently, the control unit 17 checks whether or not the notification that the component is changed to the alternative component has been received from the component arranging operation supporting apparatus 4. When the notification has not been received, the mounting machines M1 to M3 continue the component mounting operation using the master component as a target based on the component data 20 specified by the “component ID” 19d of the mount data 19. Meanwhile, when the notification has been received, the mounting machines M1 to M3 perform the component mounting operation using the alternative component as a target based on the component data 20 specified by the component ID of the alternative component.