All the exterior measure like, wheel base, windshield angle, over hang distance, Ground clearance etc are measured.
All the interior measurement like, steering angle, seating distance, pedals clearance, cargo compartment height etc are Measured.
All manikin measure like, leg room, head room, seat travel, Manikin angles, etc are Measured.
All the wind shield , window , sunroof glass surface area are measured.
The driver vision and obstruct angles are measured.