Patent ID: 7197414

Claim:
A system connected to a plurality of manufacturing tool groups comprising a plurality of manufacturing tools and a test tool testing an industrial product manufactured by the plurality of manufacturing tool groups, for identifying a manufacturing tool causing a failure in the industrial product, comprising: a data generating module configured to generate factorial effect data, based on information on a failure lot group, which is estimated based on failure lot identification information obtained by the test tool, by using an orthogonal array in which a factor column contains maintenance information and operation information as to the plurality of manufacturing tool groups, and in which a trial row specifies main effect information by every combination of levels in the factor column; a chart generating module configured to generate a factorial effect chart based on the factorial effect data; a selection module configured to select a plurality of failure lots caused by the same reason for the failure in the industrial product from among the failure lot group, based on the factorial effect chart; an identification module configured to identify one of the plurality of manufacturing tools used as a common tool for the selected plurality of failure lots, based on history information of one of the plurality of manufacturing tool groups; and a display configured to display the manufacturing tool causing a failure in the industrial product at a user terminal.