Regardless of the aim and requirement setup of an Interaction Design Project The user's needs, requirements, aspirations and expectations have to be discussed, refined, clarified and probably re-scoped Why is this?

• relative motion moves cursor
• To ensure both parties, the users and development team are absolutely on the same page Correct
• Aim to replace or update an established system
• Essential use cases represent abstractions from scenarios and try to avoid the assumptions of an use case