This document provides an overview of open innovation and innovation management strategies. It discusses how companies are increasingly using open innovation and collaborative approaches to generate new ideas both internally and from external sources. Case studies are presented on how companies like SNCF are implementing open innovation practices such as idea campaigns for employees and customers, and dialogue with stakeholders. The presentation concludes with information on open innovation marketplaces and ecosystems, and recent research from ESCP Europe analyzing the open innovation practices of 20 companies.