Stealth Mode DevelopmentWhat is the problem?Who are my customers?What do they want?Collaborative DevelopmentPrototypingBack of NapkinPaper PrototypingWireframesMock-upsDesign ThinkingGoogle Ventures’ Design SprintsBefore the Sprint: PrepareDay 1: UnderstandDay 2: DivergeDay 3: DecideDay 4: PrototypeDay 5: ValidateCustomer Development, Lean Startup, and Business Model CanvasBusiness Model CanvasLean CanvasConclusion