This type of control focuses on the outputs of the organization after transformation is complete. Sometimes called postaction or output control, fulfils a number of important functions. For one thing, it often is used when feedforward and concurrent controls are not feasible or are to costly.
Sometimes, feedback is the only viable type of control available. Moreover, feedback has two advantages over feedforward and concurrent control. First, feedback provides managers with meaningful information on how effective its planning effort was. If feedback indicates little variance between standard and actual performance, this is evidence that planning was generally on target.
If the deviation is great, a manager can use this information when formulating new plans to make them more effective. Second, feedback control can enhance employees motivation.
The major drawback of this type of control is that, the time the manager has the information and if there is significant problem the damage is already done. But for many activities, feedback control fulfils a number important functions.