The present invention is a task for the user to provide an image forming process simulation device which can determine the possibility of defects on the size of the memory included in, regardless of whether or not the image forming apparatus of that actually uses an image forming apparatus do. ; It means to accept the image data to be subjected to the image forming process in the image forming apparatus and the means for using the image data to run a simulation of an image forming process that targets the image data in the image forming apparatus and, at the same time prior to the simulation securing memory area for the image forming process, the size of the simulation, the memory size and the secure memory area as the need to monitor the memory size which is needed for the image forming process in the and a memory management means for comparison, to the image forming process simulation apparatus characterized in that it has an output means for outputting information about a result of the comparison. ; Simulation system, the simulation apparatus, terminal device, network
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