¨It is useful to break
this complex question into the following
component questions:
–Who is included in the category of "disabled and elderly persons"?
–How large is
the disabled and elderly population?
–Can't the needs of disabled or elderly persons be handled separately or as exceptions?
–Is it
economically and practically feasible to include disabled and elderly persons in the design process for mass
market products?
–What are the
"costs"?