The time needed for an output to change from the result of an input change is known as:

The time needed for an output to change in response to an input change is commonly referred to as "response time" or "settling time." This concept is especially significant in control systems and electrical engineering, as it quantifies how quickly a system reacts to changes.

In practical terms, a shorter response time indicates a faster system that can adjust quickly to inputs, which is particularly important in applications requiring real-time feedback or adjustments. It's essential to evaluate this parameter alongside other performance metrics such as rise time, overshoot, and steady-state error to have a comprehensive understanding of system dynamics.