M.A. Every day we use some type of interface from an automatic teller machine to a debit payment device in the grocery store. You can always recognize bad interface design because it's difficult to use. However, good interface design is transparent and rarely noticed.
Successful products have at least one commonality, good interface design.
The question, for one. The interface is the wrong place to begin. It implies you already have done all the rest and now you want to patch it up to make it pretty for the user. User Centered Design Interface design should begin with the user and the reasons they are using the product. We are at a place in history where we are adapting computers to human needs by replicating human features into processes and systems and by researching the cognitive, linguistic, and psychological events of humans.