1. A method for modifying a diagnostic reasoner model for use in connection with a diagnostic system for testing a plurality of systems under test, the method comprising the steps of: querying for a plurality of primary indicators from the diagnostic system, the plurality of primary indicators identifying one or more potential faults in each system under test; further querying for a plurality of supplemental indicators, each supplemental indicator providing information either validating or invalidating a particular primary indicator or association of primary indicators; and updating the diagnostic reasoner model, based on the primary indicators and the supplemental indicators, providing learning for the diagnostic reasoner model for subsequent use of the diagnostic reasoner model.