User-centered design (UCD) is a type of user interface design and a process where the end-user’s needs, wants and limitations are a focus at all stages within the design process and development lifecycle. The international standard ISO 13407 states: “Human-centred design is an approach to interactive system development that focuses specifically on making systems usable. […]

ISO defines usability as “The extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use.” (ISO 9241-11) According to Jakob Nielsen, usability is a quality attribute that assesses how easy user interfaces are to use. He saids the word […]