Part of the instructional design process is to outline the course with a Design Document after analysis and requirement gathering for the course content and determining the business goals.
Storyboards give a more detailed structure of the course. It entails the navigation, interactions, content, visuals, and audio for an eLearning course. The stakeholder approves it for the development phase if it is determined that it is well designed to achieve the business goals.
Scripts are vital for voice-over artists and developers to create audio/voiceover for the course.