A method for controlling a process plant using transition data

A method (200) for controlling a process in a process plant having one or more field devices (130, 140 and 150) using control system (110) having a controller (115), the process including a first steady state wherein the controller (115) controls the process within first operating region, a second steady state wherein the controller (115) controls the process within a second operating region, and a transition between the first steady state and second steady state, the method, by the control system (110), comprises:

• (i) receiving process data from at least one field device in relation to a first process variable associated with the process;
• (ii) determining a first value of at least one key performance indicator from the process data of the first process variable between the first steady state and the second steady state, wherein the at least on key performance indicator is indicative of a profile of the transition;
• (iii) comparing the first value with a first threshold value corresponding to the at least one key performance indicator wherein the first threshold value is calculated from one or more transitions from historic process data of the first process variable;
• and
• (iv) determining a correction factor for a process variable to be corrected, based on comparison of the first value of the at least one key performing indicator with the first threshold value for controlling the process in the process plant (100).