Input data in which fixed data and variable data are mixed is processed in a system in which a plate offset press for processing fixed data and a plateless digital press capable of processing variable data are connected. A number of pages of fixed data to be printed in succession by the plate offset press is acquired. When the acquired number of pages of fixed data to be printed in succession by the plate offset press does not exceed a number of pages of fixed data to be printed in succession in the input data, a first job is generated to assign, for the plate offset press, pages of fixed data in the input data. A second job is generated to assign, for the plateless digital press, the remaining input data obtained by excluding the fixed data assigned for the plate offset press from the input data.