From the original purpose to justify the existence of HR management by adding value and delivering results for customers and stakeholders, the American Professor Dave Ulrich developed the HR Business Partner model. From the originally four roles, there has been a development towards nine roles throughout the development of the model, which considers the >War for Talent< and hence the relevance of HR management for organizational success. The book offers a practical approach of integrating HR development as a key central challenge for delivering value, result-orientation and advancing Business Partnering within organizations and additionally on a theoretical basis.