FAILURE CAUSE ANALYZER, FAILURE CAUSE ANALYSIS METHOD, FAILURE CAUSE ANALYSIS PROGRAM, AND PROGRAM RECORDING MEDIUM

摘要

PPROBLEM TO BE SOLVED: To specify a failure cause even in the case of occurrence of failure in prediction characteristics of JIT modeling. PSOLUTION: An abnormal past data extraction portion 5 extracts past data of which the distance from operation data of an abnormal product is equal to or shorter than a set distance, out of past data in a storage portion 4, as abnormal past data. A normal past data extraction portion 6 extracts a pair of operation data processed within a prescribed time range from the time of processing of the abnormal past data in a processor 9, and characteristic data determined as a non-defective product as normal past data. A model generation portion 7 generates a model for cause analysis on the basis of the normal past data. An analysis portion 8 specifies the failure cause of a product determined to have abnormal characteristics, by contribution rates per variable based on the model for cause analysis. Thus operation data as the cause of failure can be specified from among operation data on the basis of the model for cause analysis, which is capable of satisfactorily explaining normal past data, even in the case of characteristic prediction with the JIT modeling. PCOPYRIGHT: (C)2011,JPO&INPIT