This document discusses the concepts of controlling and the relationship between planning and controlling. It defines controlling as a process of monitoring performance and taking action to ensure desired results. Controlling is a continuous, dynamic, action-oriented, and forward-looking process exercised at all levels of management. The key steps in controlling are establishing objectives and standards, measuring actual performance, comparing results to objectives, identifying deviations, and taking corrective action. Planning precedes controlling and provides the basis for it, while controlling ensures plans are implemented properly and kept on track. Planning and controlling are interdependent and mutually reinforcing functions.