Controlling is a management function that involves monitoring performance, comparing results to objectives and standards, and taking corrective action. It aims to ensure the organization achieves its desired results in an efficient manner consistent with its plans and policies. The control process involves establishing objectives and standards, measuring actual performance, comparing the results, and taking necessary actions. Controls can be preliminary, concurrent, or postaction and can be either internal through self-control or external through direct managerial action. Organizations implement various control systems including processes, compensation, discipline, information, and operations management to monitor performance.