This document discusses controlling as a management function. Controlling involves evaluating performance and applying corrective measures if necessary to ensure activities are producing desired results according to plans. The key aspects of controlling are establishing standards, measuring performance, comparing performance to standards, and taking corrective action if needed. Controlling is important as it reduces uncertainties, prevents waste and misuse of authority, and ensures coordination among management functions. Good control systems are reflective of organizational needs, forward-looking, prompt in reporting deviations, flexible, economical, and motivating. Control techniques include operational controls like financial, operating, and inventory controls as well as overall techniques like ratio analysis and management audits.