Processes for transitioning among polymerization catalyst systems, preferably catalyst systems, which are incompatible with each other. An example semiconductor device comprises a semiconductor substrate comprising an active region and a non-active region. The adjustments are weighted based on the degree to which changes in both the injection quantity and timing influence changes in both the output and emission values as determined from the sensed readings of pressure sensors in each of the cylinders. The part may be an intake manifold, a cam cover or an oil pan.