1. An evaluation model generation device for generating an evaluation model which evaluates the function or non-function of an IT system based on a system model including a process model which describes processing between processes on the IT system, a server model which describes a physical system configuration of the IT system, and allocations which represent correspondence relations between the elements in the process model and those in the server model, the evaluation model generation device comprising: a path enumeration unit which extracts a process path between processes in the process model, and a server path corresponding to the process path and located on the server model; an allocation estimation unit which estimates the allocation based on the process path and the server path; and a model conversion unit which converts the system model into the evaluation model using the process paths, the server paths, and the estimated allocations.