2. The method of claim 1 , wherein the step of identifying an ultimate set of tuning parameters for the closed-loop process further comprises: calculating an ultimate process gain and a corresponding ultimate frequency for the ultimate process gain of the closed-loop process; calculating an ultimate process time constant and a corresponding ultimate frequency for the ultimate process time constant of the closed-loop process; and calculating an ultimate process dead time and a corresponding ultimate frequency for the ultimate process dead time of the closed-loop process.
10. The method of claim 2 , further comprising the step of estimating an error in the calculated ultimate process gain frequency for the ultimate process gain.