Method and system for root cause analysis and quality monitoring of system-level faults

A system comprising:

• a memory;
• and
• a processor to:
• receive system fault codes, component fault codes, and failure modes;
• generate a first level model comprising first level causal relationships and first level causal weights between the system fault codes and the component fault codes;
• generate a second level model comprising second level causal relationships and second level causal weights between the component fault codes and the failure modes;
• combine the first level model and the second level model to generate a graphical model;
• and
• determine, using the graphical model, one or more causal probabilities.

A method comprising:

• receiving system diagnostic trouble codes (DTCs), component DTCs, and root causes;
• determining a first level model comprising first level causal relationships and first level causal weights between system DTCs and component DTCs;
• determining a second level model comprising second level causal relationships and second level causal weights between component DTCs and root causes;
• and
• generating an acyclic graphical model based on the first level model and the second level model.