1. An image forming apparatus that executes pending jobs in order of priority comprising: resources used for executing the pending jobs; a conflict judging section configured to determine whether any one of the resources required for a particular one of the pending jobs is the same as any one of the resources required for pending jobs having a priority higher than that of the particular job; and a job managing section configured to provide the particular job a right of execution responsive to a determination by the conflict judging section that any one or more of the resources required for the particular job is not the same as any of the resources required for pending jobs having a priority higher than that of the particular job, wherein: the resources include application specific integrated circuits (ASICs) comprising an image processing circuit, a scalar circuit, an image rotation circuit, a raster processing circuit, and a half tone processing circuit, and the conflict judging section and the job managing section include processors coupled to the ASICs.