Patent attributes
A machine is controlled to operate according to a first control configuration. Enhancement criteria values, that are indicative of an enhancement metric, are evaluated based on operation in the first control configuration. The machine is then controlled to operate according to a second control configuration, and the enhancement criteria are again evaluated. The machine is iteratively switched between operating in the first and second control configurations until a signal-to-background-variation-ratio with respect to the evaluated enhancement criteria is sufficient. One of the first and second control configurations are then identified as corresponding to a best enhancement criteria value.