Book excerpt: In recent years collaborative working has moved from being an optional extra of public service practice to being a core competency for individuals and teams. Has this led to better outcomes for those who use services? How to understand and to measure these outcomes and demonstrate these to a variety of different audiences remains a significant challenge for many. This revised edition of this bestselling textbook includes the latest research findings and contains more tools, frameworks and international examples of best practice to aid practitioners to more effectively evaluate partnerships. Up-to-date research evidence is presented in a practical and helpful way, making this an essential resource for students.