1. A method for classifying a vehicle driver for optimizing vehicle safety systems and devices for the driver, said method comprising: determining a number of basic driver sizes based on population distribution for each gender; determining a driver seat position for each basic driver height; identifying a set of tunable design variables that are used to adjust the vehicle safety systems and devices; performing design optimization analysis to identify an optimal design for the vehicle safety systems and devices for each of the basic driver sizes; producing a predetermined number of randomly selected reference drivers; performing crash simulations for each optimal design for each randomly selected reference drivers; identifying the design from the optimal designs that provides the best performance for each of the randomly selected reference drivers; classifying all drivers into a predetermined number of classifications where each classification represents a particular optimal design identified for each of the basic driver sizes; and setting the vehicle systems and devices for a particular vehicle driver based on the driver's height and mass using the classification and optimal designs.