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Hybrid fault reasoning and guided troubleshooting system that uses case-based reasoning and model-based reasoning

  • US 7,788,209 B2
  • Filed: 05/05/2008
  • Issued: 08/31/2010
  • Est. Priority Date: 05/05/2008
  • Status: Active Grant
First Claim
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1. A fault reasoning system comprising:

  • a model-based reasoner to take in a plurality of fault signals, and predict a likely root cause for the plurality of fault signals based upon predictions developed utilizing a model of a particular piece of equipment;

    a case database storing a plurality of prior fault signals, and associating a particular combination of fault signals with a particular root cause that has been identified in actual equipment in the past; and

    a case-based reasoner having access to said case database, said case-based reasoner taking in the plurality of fault signals, and searching the case database for a prior case having a similar set of fault signals, with said case-based reasoner predicting a likely root cause if there is a prior case having a number of similar fault signals, and said model-based reasoner being utilized to predict a root cause when said case-based reasoner does not have such a previously stored case, and wherein the plurality of fault signals is fault codes initially sent to said model-based reasoner, and said model-based reasoner inverting the fault codes to predict likely root causes as isolation solutions to be sent to said case-based reasoner.

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