Ergonomics is the field of study that seeks to fit the job to
the person, rather than the person to the job. This is achieved through the e
valuation and design of workplaces, environments, job tasks, equipment, and
processes in relationship to human capabilities and interactions in the workplace.
Anytime there is a change in the workplace (new employee, new chair, new desk),
new ergonomic solutions are required. It is important that all furniture (chairs,
desks) and other accessories are adjustable in order to meet individual
worker's needs, for no two people are alike. Ergonomics covers the entire work
area, including issues regarding the chair, workstation, and lighting.

Effective use of ergonomic practices will assist in maintaining high levels of
productivity, avoiding painful and costly employee injuries, and increasing
worker satisfaction. By designing the job around the person, employees will
have a decreased risk of injury and an improved perception of their
"employee-centered" role at work.

A short article published in oshwiki gives an excellent overview about the
related topics.

More Info

AplusA-online.de - Source: European Agency for Safety and Health at Work