The Design phase is used to interactively develop User Journeys and Visual Design and is validated against organisational requirements defined during insights and planning phase. The purpose of this phase is to experiment with different ideas, flows and visualisations, iteratively improving them based on stakeholder and user feedback. At the end of this phase, designers should feel have the main flows and the Visual Design ready to be implemented.
Design User Journeys
Designers use one or more of the information and or collateral such as process maps gathered or created during previous phases to develop concepts and flows that can be validated early with stakeholders and users.
A UI Specification is a definition of all the screens, layouts, controls, values, error conditions, interactions and messages that together provide all of the details for how a user interface works and how it should be built.