If the length of time allowed before taking the reading is equal to the rise time, an error of approximately 10% will result, since the signal will have reached only 90% of its final value.

There out, the static index (steady- state error) and the dynamic index (overshoot and rise time) of auto kinetic control system can be fix on.

To reduce the error to 1%, about two rise times must be allowed, while reducing the error to 0.1% would require roughly three rise times (or nearly seven time constants).