1. A method for monitoring performance of an advanced process control system for at least one static process output, the method comprising the steps of: receiving process performance data for the at least one static process output; comparing the process performance data to at least one of a predicted value for the process performance and a target value for the process performance; calculating at least one index that reflects comparison of the process performance data to the at least one of the predicted value for the process performance and the target value for the process performance; and indicating the results of the calculation based on the at least one index, wherein the results indicate a status of the advanced process control system.