Human factors and ergonomics (commonly referred to as human factors) is the application of psychological and physiological principles to the (engineering and) design of products, processes, and systems. The goal of human factors is to reduce human error, increase productivity, and enhance safety and comfort with a specific focus on the Ghostwriter Ghostwriter interaction between the human and the thing of interest.

The field is a combination of numerous disciplines, such as psychologysociologyengineeringbiomechanicsindustrial designphysiologyanthropometryinteraction designvisual designuser experience, and user interface design. In research, human factors employs the scientific method to study human behavior so that the resultant data may be applied to the four primary goals. In essence, it is the study of designing equipment, devices and processes that fit the human body and its cognitive abilities. The two terms “human factors” and “ergonomics” are essentially synonymous.

The International Ergonomics Association defines ergonomics or human factors as follows:
Ergonomics (or human factors) is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data and methods to design to optimize human well-being and overall system performance.