Occupant Packaging : Seat Part III

 So, in order to learn more in this we have to know about the H- point. As a quote from wikipedia;

the H-point (or hip-point) is the theoretical, relative location of an occupant's hip, specifically the pivot point between the torso and upper leg portions of the body, either relative to the floor of the vehicle^[1] or relative to the height above pavement level -- and pertinent to seating comfort, visibility from the vehicle into traffic and other design factors. Technically, the measurement uses the hip joint of a 50th Percentile male occupant, viewed laterally.^[2]

From the definition I believe we understand that the design of seat should be to achieved greater stability and comfortability of H-point.

Below are some of important imformation found in the internet.