Automotive seats are integral components in the interactions between occupants and vehicles, and ultimately the road surface traveled. Seats are important in determining the comfort ofthe ride, and therefore the user’s impression ofthe total vehicle. The occupant’s static deflected position, supported posture and comfort may be related to a set ofquantitative values known as Seat Factors. Seat Factors are quantitative measures and calculated values of structural properties for complete seats related to biomechanical interactions. Using specific procedures, measurable Seat Factors can be attained which relate to the physical properties of each seat pan. These measured quantities may then be used in a kinetic model, which calculates additional Seat Factors that can be used to predict the static deflection and rotation response ofthe buttocks and thigh region in contact with the seat pan, due to imposed loads at the hip joint center and knee. This thesis provides information regarding the procedures used to determine Seat Factors, assumptions used in modeling, kinetic models and components, model validation techniques, applications and future work.