Feedback is essential to control. In a well functioning system, feedback loop are designed so that the system is brought back under control in the act of going under control. There are two main types of feedback loops. Positive Feedback Loop, the output of a system reinforces or amplifies its initial behaviour, leading to exponential growth or a reinforcing cycle. This means that any change in the system’s output leads to further changes in the same direction. Positive feedback loops are often associated with self-reinforcing processes and can lead to either exponential growth or a rapid decline in the system. Negative Feedback Loop, the output of a system acts to counteract the initial change or disturbance, thus stabilizing the system and maintaining its equilibrium. Negative feedback loops are essential for maintaining balance and stability in a system by keeping its behaviour in check and preventing extreme deviations.
See Also: Feedback , Causal Loop