Information is applied over time in order to produce optimal conditions under which a control system may operate.
The information in a control system may proceed in a predetermined pattern, in which a sequence of steps is controlled by each preceding step, such as a series of operations which are controlled by a computer program.
Or a system may employ feedback or self-regulation which utilizes looping, reflection, or some other recursive process to control the information within the system.
A feedback system is an interactive system in which an action generates a response, which in turn acts as an influence on the initial stimulus, causing a new action to be expressed in a modified form, and so on.
Any change in a feedback system will effect every other part of the system.
For example, the adaptive adjustments made by the human body in performing a simple task such as walking, or the interactions which exist between various economic and cultural cycles, or within the ecology, are self-regulating feedback loops.
In a feedback system, information is transmitted from one part of a system to other parts of the system at different time rates.
System response time is the amount of time it takes for information to pass from a source through a channel to a receiver, or for a signal to feedback into the original source.
The response time associated with a predetermined system or a feedback system depends on the complexity of the system, and its materials and structures.