Patent Document ID: 8732112
Application ID: 13329816

Base Claim:
1. A method comprising: receiving system fault codes, component fault codes, and failure modes; generating a first level model comprising first level causal relationships and first level causal weights between the system fault codes and the component fault codes; generating a second level model comprising second level causal relationships and second level causal weights between the component fault codes and the failure modes; combining the first level model and the second level model to generate a graphical model; and determining, using the graphical model, one or more probability inferences.

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Claim 4:
4. The method of claim 1 , comprising: receiving a vehicle malfunction record comprising one or more fleet vehicle system fault codes, one or more fleet vehicle component fault codes, and one or more fleet vehicle failure modes; categorizing the vehicle malfunction record based on the probability inferences, wherein determining, using the graphical model, one or more probability inferences comprises determining marginal probabilities based on the fleet vehicle system fault codes, the fleet vehicle component fault codes, and the fleet vehicle failure modes; and outputting the categorized vehicle malfunction record to a user.