As a manager at johnson electric, an armature motor manufacturer, oliver is responsible for quality. as he carries out his controlling function, oliver sets the standard for the number of defective parts per million, and then he gathers the data measuring the actual performance. what third step of the control function should oliver take next? a) change the standards to match the actual performance. b) determine the cause of the discrepancy. c) begin planning again. d) take corrective action. e) motivate his employees.