This report provides a comprehensive analysis of organisational behaviour, focusing on the case study of Primark. It begins with an introduction to organisational behaviour, defining its key aspects and relevance. The report then delves into the impact of organisational politics, culture, and power on team behaviour and performance within Primark, exploring how these factors influence employee dynamics. It examines various types of power, including legitimate, reward, referent, informational, and expert power, and how these are utilized within the company. The report also analyses Primark's organisational culture, including power, task, person, and role cultures. Furthermore, the report discusses motivational theories, such as ERG theory and Vroom's expectancy theory, and their application in achieving organisational goals. It also differentiates between effective and ineffective teams, highlighting factors such as participation, goal understanding, conflict resolution, decision-making, and leadership. The report concludes by summarising the key findings and implications for Primark's organisational management practices.