In cybernetics and control theory, the term designates a process in which an output signal is passed back to input. It is intentionally done as a control mechanism. Feedback loops are critical not only in psychology but across domains including, for instance, finance, biology and computer networks.
Various types of feedback may be enumerated, depending on whether it increases/decreases output (positive/negative), depending on sensory apparatus (auditory, visual) or depending on subject of focus (results, performance, environment).
Feedback is way of assessment of things or processes. Feedback is an integral part of the HR department. Feedback is a way to understand the needs, requirements,performances etc of employees in an organization. One of the most comprehensive feedback systems is a 360 feedback where every person evaluates each other in the hierarchy.