The term "human-centred design" is used rather than "user-centred
design" in order to emphasize that this process also addresses impacts on a
number of stakeholders, not just those typically considered as users.
However, in practice, these terms are often used synonymously.
Usable systems can provide a number of benefits including
improved productivity, reduction in training needs, enhanced user
well-being, avoidance of stress, increased accessibility, and reduced risk
of harm.