3.  Discussion.  By reference (a), the Chief of Naval Material (CHNAVMAT) established policy to incorporate human factors requirements into the acquisition of naval materials, and assigned NAVSEA responsibility for integrating human factors into total ship and ship system engineering programs.  Human factors are defined as the activities required to integrate the human operator and maintainer into a total ship platform, system, or equipment.  Human factors are subdivided into three major categories: 1) manpower, personnel and training which is concerned with the prediction, requirements, selection, training, and assignment of personnel to operate and maintain total ship platform, systems, and equipment; 2) life support engineering which is concerned with the design, safety, personnel protection, and environmental control; and 3) human engineering which is concerned with the design, test and evaluation of total ship platform, systems, and equipment to ensure they can be effectively operated and maintained.