Patent ID: 8502998

Claim:
A processing device to carry out a predetermined process to a sheet in which an image is formed, the processing device requiring a warm-up of a predetermined time; a control unit to specify a warm-up completion time which is a time needed until the processing device completes the warm-up, to input a plurality of jobs according to a predetermined inputting operation of an operator, to specify whether the inputted job is a first job in which a process by the processing device is needed or a second job in which the process by the processing device is not carried out with regards to the inputted jobs, to specify a processing time of the second job which is inputted, and to decide an execution order of the plurality of jobs so that the second job is to be executed in preference to the first job until the warm-up completion time elapses from start of a job execution when the control unit determines that the processing time of the second job is greater than the warm-up completion time; and an image forming unit to orderly execute the jobs according to the execution order of the plurality of jobs which is decided by the control unit, wherein when a plurality of the second jobs are inputted, the control unit extracts a plurality of combination patterns of one or a plurality of the second jobs and specifies a total processing time for each of all of the extracted combination patterns, the control unit selects a combination pattern in which the total processing time satisfies a condition set based on the warm-up completion time among all of the extracted combination patterns, and the control unit decides an execution order of the plurality of jobs so that the one or the plurality of the second jobs corresponding to the selected combination pattern is executed in preference to other jobs.