Failure diagnosis device, failure diagnosis method, failure diagnosis program and recording medium

摘要

A fault diagnosis device comprises an acquisition unit that acquires diagnosis target data including parameter values of a plurality of elements from the diagnosis target system; a storage unit that stores extraction source data including a plurality of records; an extraction unit that determines an extraction condition using the diagnosis target data and condition setting information to determine the extraction condition to extract learning data from the extraction source data; a generating unit for generating learning information used for the pattern recognition process from the learning data; and a diagnosis unit that determines whether the diagnosis target data is erroneous based on the learning information. The plurality of data sets each include the parameter values of the plurality of items when the diagnosis target system is in a normal state. The extracting unit extracts, as the learning data, an upper limit number of records from a head end when a group of records satisfying the extraction condition is rearranged by a predetermined criterion among the plurality of records included in the extraction source data.