Patent Document ID: 9736031
Application ID: 14434482
Patent Flag: 1

Claim One:
1. An information system construction assistance device comprising: a selection screen presentation unit that presents a selection screen for selecting a requirement item group provided according to a specific task requirement in inputting construction requirements of a construction expected system that is an information system to be constructed; an input screen presentation unit that presents an input screen for inputting parameters included in the selected requirement item group; a system model selection unit that selects a system model satisfying the construction requirements based on the input parameters from the system models set as design information units of a previously stored system; an operation information acquisition unit that acquires operation information of an existing system that is an already constructed information system, on the basis of the system model selected by the system model selection unit and a similar system model similar to the system model; a performance evaluation unit that evaluates a performance of the system model selected by the system model selection unit, using parameters which are included in the operation information acquired by the operation information acquisition unit; a construction candidate presentation unit that compares the performance of the system model evaluated by the performance evaluation unit and the construction requirements based on the input parameters, and presents an information system in which a system factor for determining a size of a system included in the design information of the system model selected by the system model selection unit is constructible by using the selected system model, as a candidate of the construction expected system; a similarity calculation unit that calculates similarity to the input construction requirements with respect to each operation information by comparing parameters which are included in the operation information acquired by the operation information acquisition unit and the input construction requirements; a system factor determination unit that determines the system factor of a server included in the design information of the system model selected by the system model selection unit, by comparing the performance of the system model evaluated by the performance evaluation unit and the construction requirements based on the input parameters; and the system factor determination unit determining the system factor by robust optimization using a reciprocal of the similarity calculated in the similarity calculation unit as a factor of uncertainty; wherein the selection screen presentation unit, the input screen presentation unit, the system model selection unit, the operation information acquisition unit, the performance evaluation unit, the construction candidate presentation unit, the similarity calculation unit, and the system factor determination unit are implemented by one or more hardware processors.