Human factors are employed to fulfill the goals of occupational health, safety and productivity. It is relevant in the design of such things as safe furniture and easy-to-use interfaces to machines and the equipment. Ergonomic design is necessary to prevent repetitive strain injuries and other musculoskeletal disorders, which can develop over time and can lead to long-term disability. Human factors and ergonomics are concerned with the "fit" between the user, equipment, and environment. It accounts for the user's capabilities and limitations in seeking to ensure those tasks, functions, information, and the environment suit that user.
To assess the fit between a person and the used technology, human factors specialists or ergonomists consider the job being done and the demands on the user; the equipment used, and the information used Ergonomics draws on many disciplines in its study of humans and their environments, including anthropometry, biomechanics, mechanical engineering, industrial engineering, industrial design, information design, physiology, kinesiology, cognitive psychology, industrial and organizational psychology, and space psychology.