This project delves into the realm of organisational behaviour, focusing on Marks and Spencer (M&S). It examines the impact of organizational culture, politics, and power dynamics on individual and team performance, exploring how these factors shape employee behaviour. The project analyzes M&S's organizational culture using Handy's model, discussing power, role, task, and person cultures. It also investigates organizational politics, including personal, decisional, structural, and change-related aspects, and how these influence employee performance. Furthermore, the project explores French and Raven's power model, highlighting reward, expert, legitimate, coercive, and referent power. The report also covers motivation theories, such as process theories (Adams' Equity model) and goal-setting theory, along with motivation techniques like reward strategies, communication skills, emotional intelligence, and flexible working hours. It then differentiates between effective and ineffective teams, providing insights into team dynamics. Finally, the project applies concepts and philosophies of organisational behaviour to a business situation, ultimately aiming to provide strategies for enhanced organizational effectiveness at Marks and Spencer.