One of the major components of the problems associated with the introduction of office automation is the computer screen. The computer screen demands that the user work within a very restricted posture range. Unlike a book, a computer screen cannot be read from the side. Consequently, the relationship of the user to the computer is frozen. The postures that result are not normal for the human.
Posture is a dynamic process of movement.
If the computer screen freezes a person into only one posture, the result is discomfort, hence the requirement for ergonomic furniture. Adjusting posture throughout the work day by using adjustable furniture reduces postural discomfort. Ignoring ergonomic requirements has a substantial cost. The large number of people reporting discomfort while using computer equipment has resulted in many research studies and investigations. These investigations and the continued high user complaint rate has prompted the development of guidelines in Canada and legislation in the United States regulating the design of office equipment and the duration of video display terminal work.