METHODOLOGY TO IMPROVE FAILURE PREDICTION ACCURACY BY FUSING TEXTUAL DATA WITH RELIABILITY MODEL
First Claim
1. A method for creating reliability models for a component or system, said method comprising:
- providing a text document containing technician comments about service events on the component or system;
extracting failure modes from the text document using a digital computing device encoded with text mining techniques; and
creating reliability models for the component or system using the failure modes which were extracted.
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Abstract
A method and system for developing reliability models from unstructured text documents, such as text verbatim descriptions from service technicians. An ontology, or data model, and heuristic rules are used to identify and extract failure modes and parts from the text verbatim comments associated with specific labor codes from service events. Like-meaning but differently-worded terms are then merged using text similarity scoring techniques. The resultant failure modes are used to create enhanced reliability models, where component reliability is predicted in terms of individual failure modes instead of aggregated for the component. The enhanced reliability models provide improved reliability prediction for the component, and also provides insight into aspects of the component design which can be improved in the future.
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Citations
20 Claims
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1. A method for creating reliability models for a component or system, said method comprising:
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providing a text document containing technician comments about service events on the component or system; extracting failure modes from the text document using a digital computing device encoded with text mining techniques; and creating reliability models for the component or system using the failure modes which were extracted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for creating reliability models for a vehicle sub-system or component, said method comprising:
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providing a database containing information about vehicle service events; exporting a text document from the database, said text document containing technician comments about the service events; extracting failure modes from the text document using a digital computing device encoded with text mining techniques; creating reliability models for the vehicle sub-system or component using the failure modes which were extracted, including a reliability model for each of the failure modes; and using the reliability models to predict a number of failures of the vehicle sub-system or component at a given exposure. - View Dependent Claims (12, 13, 14)
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15. A system for creating reliability models for a vehicle sub-system or component, said system comprising:
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means for providing a text document containing technician comments about service events on the vehicle sub-system or component; a digital computing device encoded with text mining techniques for extracting failure modes from the text document; and means for creating reliability models for the vehicle sub-system or component using the failure modes which were extracted. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification