Abstract. Today innovators need to be able to quickly respond to the changing environment. Successful innovation requires an open viewpoint taking into account desirability (is there a problem or need worth solving?), viability (is there a possibility to create a viable business?) and feasability (is it possible to create the solution?). This asks for innovation management approaches that provide rapid answers on multiple innovation related aspects for increasingly complex innovation challenges. One popular approach is the so-called ‘Design Sprint’. At imec, a world-leading R&D and innovation hub, we have created the Problem-Solution Sprint which combines the agile, time-boxed and process-driven approach from the Design Sprint with the user-centered, multi-stakeholder and real-life aspects of Living Labs. Moreover, this approach also utilizes the Innovatrix-framework and innovation management methodology to systematically validate the most critical assumptions. Based on our experience from 10+ Problem-Solution sprints, we highlight some key findings and
lessons learned for Living Lab scholars and practitioners.