The duration of an RVSS is an important factor that can be overlooked. An
RVSS program which controls only the input profile can cause fatigue damage if
the RVSS duration is too long. However, for a properly conceived RVSS that
determines and controls the input profile, fatigue is of little concern for
the duration times required. The requirement for ten minutes in each axis is
derived from studies that demonstrate maximum screening effectiveness is
obtained in eight to ten minutes.