Outsourcing is here to stay. It is inextricably linked to the globalization of business. International trade networks continue to connect the world's economies and organizations increasingly turn to partners, often through outsourcing, to help them: • better leverage what they are best at, • gain greater flexibility and reach and • drive down their overall business costs and risks. The Harvard Business Review lists outsourcing as one of the most important new management ideas and practices of this century. This substantial title is the official version of the Outsourcing Professional Body of Knowledge by IAOP (International Association of Outsourcing Professionals), in short: OPBOK. This is the official publication of OPBOK Version 10. This new version has been revised on these points: • New appendix on applicable Rules and Regulations applicable to outsourcing. • New appendices mapping COP Standards to eSCM-SP and eSCM-SP capability models. • New and updated definitions on various forms of outsourcing, graphics, and templates. • More detailed discussions on: various outsourcing geographies, renewing and exiting agreement options, change management, multi-sourcing management and roles of PMO, and other new trends in outsourcing.