An apparatus for determining a correlation of a processing state of an object with RF feedback received from an energy application zone during processing of the object in the energy application zone may include at least one detector configured to detect the RF feedback from the energy application zone. The apparatus may also include at least one controller configured to receive from the at least one detector the RF feedback; receive an indication of one or more processing states of the object (e.g., as indicated by at least one processing state indicator); and determine a correlation between the received RF feedback and the one or more processing states.