The document discusses Ulrich's model of human resources (HR) management, which defines four key roles for HR: strategic partner, administrative expert, employee champion, and change agent. It then examines research on adopting Ulrich's model in practice, finding that less than 30% of organizations fully implemented the model, while 30% partially implemented it. Some organizations structure HR into shared services, centers of excellence, and strategic business partners instead of Ulrich's four roles. Successfully implementing business partnering requires strong relationships across HR functions and assessing whether HR has the needed skills.