1. A method for setting an occupant classification system threshold for a vehicle occupant detection system, the method comprising: collecting occupant classification system data for a seat, the data being indicative of occupant weight; analyzing the data to determine where a separation exists between an occupant for which a restraint should be suppressed and an occupant for which the restraint should be deployed; and analyzing the data to determine a worst case child suppression weight and shape, which is based at least on where the separation exists; wherein the worst case child suppression weight and shape define the occupant classification system threshold.