Production management system of component mounting line

A production management system of a component mounting line, comprising:

• a component mounter arranged in a line on a conveyance path along which a circuit board is conveyed, the component mounter including a suction nozzle configured to mount components supplied from a component supply device on to the circuit board;
• a production management computer connected to the component mounter via a network of the production management system, wherein
• a board ID recording section on which is recorded or memorized a board identification information “board ID” provided on the circuit board conveyed in the component mounting line,
• the component mounter is configured to
• identify the board ID of the circuit board that is loaded during production and send the board ID and a time stamp to the production management computer,
• measure actual machine data for early-stage-discovery of a mounting defect at a specified measurement interval during production, and
• send a measurement result of the measuring to the production management computer, and
• the production management computer is configured to
• save the board ID with the time stamp sent from the component mounter,
• monitor whether there is a possibility of a mounting defect based on the measurement result of the actual machine data for early-stage-discovery of a mounting defect for the component mounter,
• when determining that there is the possibility of the mounting defect at the component mounter, extract the board IDs of previous circuit boards on which components were mounted at the component mounter since a previous time that measurement was performed, based on the measurement interval and the board ID with time stamp, and
• display a list of the previous circuit boards as a list of circuit boards for which there is the possibility of the mounting defect.