An occupant support system (200, 400, 600, 800, 1000) comprising a configuration control system having: - a computer configured to provide means for: - receiving occupant data associated with an occupant, - calculating a best-fit body arrangement of the occupant; and - an interface configured to obtain the occupant data, as a result of: - receiving manually input occupant data obtained from the occupant by asking the occupant a set of questions and measuring occupant's body parts; and/or - scanning the occupant by a sensor included in the configuration control system, wherein the sensor is coupled to the computer to communicate the occupant data to the computer, and wherein the computer may be spaced apart from the interface and coupled to the interface to communicate with the interface by a communication unit included in the configuration control system, so that the occupant's comfort and/or safety is increased when the occupant's body is in the best-fit body arrangement, characterized in that the computer is configured to provide means for - calculating a set of body ratios using the occupant data, - calculating external body dimensions using the body ratios and occupant data, - calculating internal body dimensions using an estimate of a thickness of the occupant's flesh and external body dimensions, and - calculating the best-fit body arrangement of the occupant using the internal body dimensions and predetermined criteria. - a computer configured to provide means for: - receiving occupant data associated with an occupant, - calculating a best-fit body arrangement of the occupant; and - receiving occupant data associated with an occupant, - calculating a best-fit body arrangement of the occupant; and - an interface configured to obtain the occupant data, as a result of: - receiving manually input occupant data obtained from the occupant by asking the occupant a set of questions and measuring occupant's body parts; and/or - scanning the occupant by a sensor included in the configuration control system, wherein the sensor is coupled to the computer to communicate the occupant data to the computer, and wherein the computer may be spaced apart from the interface and coupled to the interface to communicate with the interface by a communication unit included in the configuration control system, so that the occupant's comfort and/or safety is increased when the occupant's body is in the best-fit body arrangement, characterized in that the computer is configured to provide means for - calculating a set of body ratios using the occupant data, - calculating external body dimensions using the body ratios and occupant data, - calculating internal body dimensions using an estimate of a thickness of the occupant's flesh and external body dimensions, and - calculating the best-fit body arrangement of the occupant using the internal body dimensions and predetermined criteria. - receiving manually input occupant data obtained from the occupant by asking the occupant a set of questions and measuring occupant's body parts; and/or - scanning the occupant by a sensor included in the configuration control system, wherein the sensor is coupled to the computer to communicate the occupant data to the computer, and wherein the computer may be spaced apart from the interface and coupled to the interface to communicate with the interface by a communication unit included in the configuration control system, so that the occupant's comfort and/or safety is increased when the occupant's body is in the best-fit body arrangement, - calculating a set of body ratios using the occupant data, - calculating external body dimensions using the body ratios and occupant data, - calculating internal body dimensions using an estimate of a thickness of the occupant's flesh and external body dimensions, and - calculating the best-fit body arrangement of the occupant using the internal body dimensions and predetermined criteria.