An answer to the inquiry is performed (ST3). The answer is performed by operating Yes operation button 55c or No operation button 55d by the worker on inquiry screen 55 illustrated in FIG. 13A. Here, in a case where Yes operation button 55c is operated, the board reverse carry-in is executed for work station A1 as a target (ST4). In (ST3), when No operation button 55d is operated, the process skips (ST4) and proceeds to the next step.

In the next step, similar to (ST2), the board carry-in place inquiry is performed for work station A2 as a target (ST5). Similarly, an answer to the inquiry is performed (ST6). Similarly, in a case where an answer indicating Yes is performed, the board reverse carry-in is executed for work station A2 as a target (ST7). In addition, in (ST6), in a case where an answer indicating No is performed, the process skips (ST7) and proceeds to the next step.

In the next step, similar to (ST2), the board carry-in place inquiry is performed for work station B1 as a target (ST8). Similarly, an answer to the inquiry is performed (ST9). Similarly, in a case where an answer indicating Yes is performed, the board reverse carry-in is executed for work station B1 as a target (ST10). In addition, in (ST9), in a case where an answer indicating No is performed, the process skips (ST10) and proceeds to the next step.