The ability of employees to do their jobs is influenced by workspace attributes, equipment and job content
While deviation from optimal design of work equipment and environments is tolerable, there is a limit to the amount of adaptation to unsuitable conditions an employee can reasonably be asked to make.
Beyond this point there is a cost, which can be defined in terms of efficiency, discomfort, frustration and dissatisfaction, work stress, attrition, and increased potential for accidents and personal injury. In short, good ergonomics can be defined as "fitting the task the the person, rather than the person, to the task"