This report evaluates the significance of organizational design theory, employing pertinent theories and critically analyzing diverse motivational approaches. It offers recommendations for enhancing sustainable performance delivery and assesses the influence of emerging HR trends on the HR function. Furthermore, it provides a critical evaluation of how organizational design should adapt to change management. The report uses RHP housing association as a case study to illustrate practical applications of these concepts, covering classical organization theory, contingency theory, and systems theory. It also examines various motivational approaches such as authoritarian, paternalistic, and exchange approaches, as well as knowledge management approaches like tacit and explicit knowledge. The report concludes with recommendations for RHP to improve sustainable performance through strategic alignment, customer engagement, transparent communication, and timely performance reviews. Desklib provides access to a wealth of resources, including past papers and solved assignments, to aid students in their studies.