INFORMATION SYSTEM CONSTRUCTION ASSISTANCE DEVICE, INFORMATION SYSTEM CONSTRUCTION ASSISTANCE METHOD, AND INFORMATION SYSTEM CONSTRUCTION ASSISTANCE PROGRAM

An objective of the present invention is to present an optimal information system in accordance with build requisites which a user desires. An information system building assistance device includes: a selection screen presentation unit which presents a screen whereupon is selected a requisite term group which is disposed according to a specified task requisite; an input screen presentation unit which presents a screen whereupon parameters of the requisite term group are inputted; a system model selection unit which selects a system model which satisfies the build requisite based on the parameters; an operation information acquisition unit which acquires, on the basis of a selected system model group, operation information of an existing system; a performance evaluation unit which, using the parameters of the operation information, evaluates the performance of the selected system model; and a build candidate presentation unit which presents an information system which is buildable using the system model produced after determining a sizing factor for the selected system model by comparing the result of the evaluation and the building requisite.