In the case of FIG. 6, the rasterizing speed for the print job #1 is 100 meters/minute, which is higher than the maximum transport speed of the image forming apparatus 10. Therefore, the print speed at the time when the print job #1 has been read out is set to 80 meters/minute. The display device 34 (see FIG. 1) displays an indication that 7 minutes and 30 seconds is needed to print the print job #1 for 600 meters at a speed of 80 meters/minute. The print job #1 is allocated to rolled paper #1.

FIG. 7 illustrates a state in which the second print job #2 has been read out from the list managed by the job information management section 311. The rasterizing speed for the second print job #2 is 60 meters/minute, which is lower than the print speed of 80 meters/minute which is used to print the first print job. Therefore, the lowest rasterizing speed is updated to 60 meters/minute. Therefore, the print speed at the time when the print job #2 has been read out is updated to 60 meters/minute, including the print speed of the print job #1. Accordingly, the job execution time of the print job #1 with a paper travel distance of 600 meters is updated from 7 minutes and 30 seconds to 10 minutes.

Since the paper travel distance of the print job #2 is 240 meters, the job execution time of the print job #2 is 4 minutes.