User-Centered Design (UCD) is a philosophy and a process that places the person at the centre and focuses on cognitive factors as they come into play during peoples' interactions with things. It concerns and can improve itself with both usefulness and usability. A key aspect of successful User-Centered Design is evaluating early and throughout the UCD process. User centered design is receiving increasing attention in recent years. Various methods and tools are used within organizations to improve the understanding of user and task requirements, support the iteration of design and evaluation. User-Centred Design Methods can be extremely valuable although using them in the right way, for the right reasons and at the right time is critical. It will differ from project to project to decide exactly which method to use, and when and how to use.