1. A control system for controlling operation of a production system with a plant that can achieve one or more production goals, the control system comprising: a planner operative to provide plans for execution using one or more plant resources in the plant; a model of the plant; and a diagnosis system comprising: a plurality of diagnostic abstractions individually representing one or more fault assumptions regarding resources of the plant with a complexity of the fault assumption or assumptions of each diagnostic abstraction being different, a belief model comprising at least one fault status indication for at least one resource of the plant, and a diagnoser including: an abstraction diagnosis component operative to initially select a first one of the plurality of diagnostic abstractions having the least complex fault assumption or assumptions and to subsequently select another one of the diagnostic abstractions having more complex fault assumptions when a most recently selected diagnostic abstraction is logically inconsistent with the current fault status indications in the belief model, and a domain diagnosis component operative to determine a current plant condition and to update the belief model based at least partially on the currently selected diagnostic abstraction, a previously executed plan, at least one corresponding observation from the plant, and the plant model.