Production management system

A production management system for a production line mixedly including at least one robot operation step in which at least one robot operation is performed and at least one manual operation step in which at least one manual operation is performed, the robot and manual operation steps being along a transfer conveyor, the production management system comprising:

• a transfer rail disposed alongside and parallel to the transfer conveyor at the robot operation step;
• a robot rotatably received on a platform that is slidably disposed on the transfer rail;
• a monitor that displays a cause of abnormality that occurs at the robot operation step;
• a warning device that warns of an occurrence of the abnormality at the robot operation step;
• and
• a robot reversing device that rotates the robot 180° about an axis that vertically extends from the platform, the robot being rotated the 180° so that the robot faces away from the transfer conveyor after the robot is returned to an original position along the transfer rail when the abnormality occurs at the robot operation step,
• wherein production is continued where the robot was located when the abnormality occurred by using a back up operator to replace the robot operation with a corresponding manual operation,
• and wherein said manual operation step being utilized even when the abnormality does not occur, and a repair operation is simultaneously performed for the robot that has been rotated the 180° about the vertical axis so as to be facing away from the transfer conveyor by said robot reversing device.