Strategy-Scope-Structure-Skeleton-Surface

Strategy-is the intersection between solving their peple problem and achieving their business goal.

Scope- Determines the set of features that are necessary for a feasible solution here you are figuring out how much work.

Structure-Interaction Design and Information Architecture, Information Architecture

Skeleton- UI and Navigation design. Start designing the Navigation Design and picking a tab bar or hamburger menu.

Surface- Visual Design helps the interface be more accessible and easy to use and understand.