Settling time
The time interval between the beginning of a sustained disturbance and the instant when the resulting change in the output signal (after sufficient damping) reaches and remains within a specified fraction of its final steady-state value.
Figure 3 - Typical time response of a system to a step increase of input.
Reference: I.E.C.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
