When a user selects an existing image forming apparatus and a virtual image forming apparatus, a job log acquisition unit acquires a job log from the selected existing image forming apparatus. A simulation unit calculates a processing speed of the existing image forming apparatus and a processing speed of the virtual image forming apparatus. The simulation unit performs job processing using the virtual image forming apparatus, and acquires a job log. The simulation unit compares the job log of the existing image forming apparatus and the job log of the virtual image forming apparatus, calculates a replacement effect, and outputs the replacement effect.