A process is disclosed for controlling a plurality of magnetrons of a thermal processing tunnel in accordance with a preconfigured magnetron actuation scheme. In some implementations, the process can include the steps of: receiving an identifier indicating a predefined packaged food product configuration; based on the identifier, obtaining a preconfigured magnetron actuation scheme that is preconfigured based on at least one characteristic of the predefined packaged food product configuration, wherein the preconfigured magnetron actuation scheme is preconfigured to cause at least one of the plurality of magnetrons to have a different execution characteristic than at least one other magnetron of the plurality of magnetrons; and transmitting at least one instruction in accordance with the preconfigured magnetron actuation scheme to a signal controller that drives the plurality of magnetrons, thereby causing the plurality of magnetrons to execute in accordance with the preconfigured magnetron actuation scheme.