The information architecture and the navigation structure are developed in parallel with the prototypes. From a human-centred point of view, the information architecture is the naming and structuring of the information that is accessible to users.

The navigation structure is the logical organisation of the screens, pages and windows that comprise the user interface - that is, the links and menus that enable users to get from one set of information to another.

Answer A is both user experience and usability/satisfaction Answer D is correct according to the definition of 'satisfaction', example 4. It's also more correct than answer A, B, C and E.

Human-centred design is an approach to design that aims to make interactive systems more usable by focusing on the use of the interactive system and applying usability knowledge and methods. Human-centred design is based upon an explicit understanding of users, goals, tasks, resources and environments. Users are involved throughout the design. The design is driven and refined by usability evaluation. The process is iterative - that is, it continues until the user requirements are met. The design addresses the whole user experience (UX).

Human-centred design means planning for iterations, getting user feedback as early and as often as possible. It is perfectly acceptable to run through the iterations often with lightweight UX deliverables, for example in agile development.

An approach to design that aims to make interactive systems more usable by focusing on the use of the interactive system and applying human factors, ergonomics and usability knowledge and methods. Notes: 1. The concept 'human-centred design' is used instead of 'user-centred design' to emphasise the need to consider additional stakeholders who may not be users. 2. Feedback from users through usability evaluation is a critical source of information in human-centred design.