Rise time
The time required for the output of a system to make the change from a small specified percentage (often 5 to 10%) to a large specified percentage (often 90 to 95%) of the steady-state value either before overshoot or in the absence of overshoot.
Note:: If the term is unqualified, response to a step change is understood; otherwise the pattern and magnitude of the stimulus should be specified.
Figure 3 - Typical time response of a system to a step increase of input.
Reference: ANSI (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
