1. A method for automatically tuning an agricultural combine ( 100 ), comprising steps of: a. receiving ( 304 ) a signal from an operator of the agricultural combine ( 100 ) indicating that current operation of the agricultural combine ( 100 ) operation is acceptable; b. determining ( 306 ) current performance parameters of the agricultural combine after the step of receiving; c. calculating ( 310 ) a performance parameter error limit for each of the current performance parameters determined in the immediately previous step; d. again determining ( 312 ) current performance parameters; e. comparing ( 314 ) the again determined current performance parameters with the performance parameter error limits to thereby determine whether one or more of the again determined current performance parameters falls outside its associated performance parameter error limit; and f. if at least one of the again determined current performance parameters falls outside its associated performance parameter error limit as determined in the previous step, then calculating ( 316 ) changes to machine settings of the agricultural combine ( 100 ) that will bring the at least one of the again determined current performance parameters back within its associated performance parameter error limit.