This report provides a comprehensive analysis of organizational performance, focusing on High Performance Working (HPW), Performance Management (PM), and Change Management strategies. It begins by defining HPW and its components, including vision, employee engagement, and culture, and then evaluates its results, such as sustained organizational performance, employee wellbeing, and competitive advantage. The report also identifies barriers to HPW, such as globalization and lack of support. The second section delves into Performance Management, defining it, outlining its components and cycle, and exploring the roles of line managers and other participants. It further examines how PM contributes to building capability, promoting diversity and inclusion, and fostering learning and development. The report also covers talent management, succession planning, and reward systems. Finally, it addresses change management, communities of practice, employee value proposition (EVP), and organizational culture, providing insights into how these elements impact and contribute to high organizational performance. The report concludes with a discussion of how HR can help develop a culture of continuous improvement.