A turbine machine, comprising: a compressor; a combustion system; a turbine section comprising a turbine (118; 218; 618) operating at an initial turbine output while using control parameters of the turbine machine, wherein each of the control parameters has a respective initial parameter value (236; 336); and a turbine control system (232; 332; 632) comprising: a modeler (238; 338; 638) that predicts a predicted turbine output (242; 342; 642) when the turbine is operated at, for respective control parameters, a parameter value; and a controller (240; 340; 640) that: for each of the control parameters selected from the control parameters of the turbine machine: selects an adjustment of the respective initial parameter value (236; 336; 636) of the selected control parameter, and invokes the modeler with the adjustment of the selected control parameter (334; 634) and with the respective initial parameter values for the other control parameters to predict a predicted turbine output for the selected control parameter; compares the predicted turbine outputs (242; 342; 642) for the adjustments of the respective control parameters to select, from the control parameters, a target control parameter (244; 344; 644) having a target adjustment that results in the target turbine output (224; 324); and operates the turbine with the target adjustment of the target control parameter. a compressor; a combustion system; a turbine section comprising a turbine (118; 218; 618) operating at an initial turbine output while using control parameters of the turbine machine, wherein each of the control parameters has a respective initial parameter value (236; 336); and a turbine control system (232; 332; 632) comprising: a modeler (238; 338; 638) that predicts a predicted turbine output (242; 342; 642) when the turbine is operated at, for respective control parameters, a parameter value; and a controller (240; 340; 640) that: for each of the control parameters selected from the control parameters of the turbine machine: selects an adjustment of the respective initial parameter value (236; 336; 636) of the selected control parameter, and invokes the modeler with the adjustment of the selected control parameter (334; 634) and with the respective initial parameter values for the other control parameters to predict a predicted turbine output for the selected control parameter; compares the predicted turbine outputs (242; 342; 642) for the adjustments of the respective control parameters to select, from the control parameters, a target control parameter (244; 344; 644) having a target adjustment that results in the target turbine output (224; 324); and operates the turbine with the target adjustment of the target control parameter. a modeler (238; 338; 638) that predicts a predicted turbine output (242; 342; 642) when the turbine is operated at, for respective control parameters, a parameter value; and a controller (240; 340; 640) that: for each of the control parameters selected from the control parameters of the turbine machine: selects an adjustment of the respective initial parameter value (236; 336; 636) of the selected control parameter, and invokes the modeler with the adjustment of the selected control parameter (334; 634) and with the respective initial parameter values for the other control parameters to predict a predicted turbine output for the selected control parameter; compares the predicted turbine outputs (242; 342; 642) for the adjustments of the respective control parameters to select, from the control parameters, a target control parameter (244; 344; 644) having a target adjustment that results in the target turbine output (224; 324); and operates the turbine with the target adjustment of the target control parameter. for each of the control parameters selected from the control parameters of the turbine machine: selects an adjustment of the respective initial parameter value (236; 336; 636) of the selected control parameter, and invokes the modeler with the adjustment of the selected control parameter (334; 634) and with the respective initial parameter values for the other control parameters to predict a predicted turbine output for the selected control parameter; selects an adjustment of the respective initial parameter value (236; 336; 636) of the selected control parameter, and invokes the modeler with the adjustment of the selected control parameter (334; 634) and with the respective initial parameter values for the other control parameters to predict a predicted turbine output for the selected control parameter; compares the predicted turbine outputs (242; 342; 642) for the adjustments of the respective control parameters to select, from the control parameters, a target control parameter (244; 344; 644) having a target adjustment that results in the target turbine output (224; 324); and operates the turbine with the target adjustment of the target control parameter.