One Day Design Sprint. Morning 8 am Start. Just one USP User Flow. Virtual Projection everything on Apple Watch size screen. Limited Space, limited Information Architecture, limited Interaction Design & linear task flow. 2 PM Usability Testing. 4 PM improvisation on data collected. 6 PM wrapup.
One day design sprint will definitely make sure that by the evening you justify your product tagline else discard the whole idea.
I think the Screen Size (Apple Watch, Phone, Tablet, Desktop, TV, Projector) proportional to the Design Sprint’s duration (week / days)?