The printing process control apparatus according to claim. 1, further comprising a second storage unit adapted to store schedule assignment states of the printer and post-processing apparatus, wherein said schedule decision unit includes an assignment determination unit adapted to determine advisability of assignment of a preceding process in the processing process jobs in accordance with the reservation state of other processing process job obtained from the reservation state stored in said second storage unit and the idle state of a succeeding process and decide the schedule of each of the processing process jobs in accordance with the assignment determination result.