Learners will develop an understanding of principles and models of Human Computer Interaction (HCI). They will evaluate existing HCI design and principles, using this to help them plan their own prototype user interface. They will formulate design documentation to plan an interface for a product. Learners will implement the plan to create a prototype and then review and amend it based on user feedback. The unit is initially concerned with the understanding of key principles of human computer interaction (HCI), focusing on evaluating HCI principles, the critique of interface designs using HCI principles and evaluating user interaction when using different IT applications. The unit also discusses the steps associated with planning an interface for specific application requirements following client briefs, as well as applying a range of interface design techniques while adhering to industry standards. Finally, the unit is concerned with the creation of user interface prototypes based on planning documentation. Emphasis is placed on critically reviewing user experience of the user interface and evaluating with the aid feedback from end users