This report discusses different theories and models of leadership and management that are used in different companies. It also explains the different types of leadership styles that facilitate an organisation in conducting its business operations in an effective and efficient manner. The report also covers factors that influence the development of culture within the workplace and the significance of organisational culture. The impact of leadership and management theories on the effectiveness of a large organisation is analysed, and the importance of organisational culture on the performance of different organisations is evaluated.