Ship allocation plan creation device and method

A ship allocation plan creation device creates a ship allocation plan for transporting raw materials of a plurality of brands from a plurality of loading ports to a plurality of discharging ports. The ship allocation plan creation device comprises: a data acquisition means; a ship resource creation means; a mathematical model setting means for setting a mathematical model for expressing at least the operation restriction of a ship included in a ship resource and the supply and demand balance restrictions of the raw materials at the discharging ports; an optimization calculation means for, using the set mathematical model, performing an optimization calculation according to an objective function constructed for at least transport cost; a simulator operating according to the optimization calculation result and including a stock transition simulator for simulating the transition of a stock state and a ship operation state transition simulator for simulating the transition of a ship operation state; and an outpu