"A systems-environment interaction or process by which the system responds to the changing requirements of its environment".(B BANATHY, 1973, p,85)
Adjustments, according to B, BANATHY "are changes that a system brings about in order to modify its behavior, structure and characteristics so that it can produce improved system outputs or system states" (Ibid.)
The capability for making adjustments is the general condition for adaptability in any system.
Speed is a crucial factor in adjustment. N RASHEVSKY states: "�whenever any system is displaced from its equilibrium configuration, it always takes a finite time to reach that equilibrium again" (1967, p,72).
If the need for new adjustments appears before the first one has been completed, complex effects related to the time lag mechanism may introduce new phenomena, as for example hysteresis.