User Center Design, or UCD, is a process by which a design in which is sensible to all the people who will use the product. Designers make sure they are aware that the audience is their number one importance. The design process goes through different steps in order to meet the audience’s requirements: Analysis Phase, Design Phase, Implementation Phase and Deployment Phase. In the Analysis Phase, the designer investigates what this document must include, such as important information and the message it’s trying to convey. In this phase, the designer looks at different user scenarios. In the Design Phase, the ideas come into play. Design concepts are thought of and prototypes are tested. In the Implementation Phase, usability test are performed and the design is implemented. In the Deployment Phase, the designer receives feedback from the user.
The document above is a based on a user-centered design. It is an airline safety card. This safety card shows what you should do in care of an emergency. Since many people travel from all different places, there are no words on this document. The pictures serve as a universal language. If this card was given to different people who speak different languages, the message would still get across. This is a successful UCD document.
http://www.upassoc.org/usability_resources/about_usability/what_is_ucd.html