Designing for Use-

A short or too tall a person is always made to feel that he is abnormal. Many products are designed for just the average person, with no thought for the fact that fully 50 percent are below that normal and another 50 percent above it. If only a margin for adjustment was provided, a lot more person would be happier. Many products inconvenience even a normal person. A person has to be a contortion artist to slip in and out from behind the steering wheel of most automobiles. Common household scissors threaten permanent cramps in fingers and palms.
A designer will do well to remember that the product he develops is to be used by people. A well-designed product is one that can be used by people more comfortably, more safely and with more efficiently. It is the product that should be fitted to the person, rather than the other way round. Designing for use essentially consists of ensuring that the points of conflict between machine and men be rounded out in favour of men.