This document outlines how to break down silos and join up functions to deliver differentiated customer experiences. It identifies common barriers like siloed behaviors and rigid strategies focused on problems rather than opportunities. The document recommends an approach called "co-invention", which brings together teams to invent new customer experiences that have never existed before. This breaks down boundaries and drives growth. The key to implementing co-invention is adopting the "3i Drivers": invention in strategy and execution, integration of real working practices, and ingenuity of people. Adopting these practices can help organizations overcome barriers and deliver outstanding customer experiences.