Working height is of critical importance in the design of
workplaces. If work is raised too high the shoulders must
frequently be lifted up to compensate , which may lead to
discomfort, even painful cramp in the neck and shoulders. If the
working height is too low the back must be excessively bowed ,
which often causes backache . Hence , the work surface must be
of such a height that it suits the stature of the operator, whether
standing or sitting at the work