Controlling is the process of ensuring actual activities conform to planned activities. It involves establishing performance standards, measuring actual performance, comparing actual results to standards, and taking corrective action as needed. There are three types of control: feed forward control sets policies before operations begin; concurrent control monitors and adjusts activities as they occur; and feedback control measures outputs, compares them to standards, and implements corrective actions. Control techniques include budgetary methods like operating, variable, and zero-base budgets. Non-budgetary methods include statistical data, reports, auditing, and personal observation. Modern methods include PERT, management information systems, and computers. An effective control system focuses on critical points, integrates all controls, and tail