This report explores the classical and neo-classical approaches to organisation theories and assesses the forces that shape the structure of companies for the future. It discusses the key concepts and insights of the classical and neo-classical approaches, as well as the differences between them. It also examines the factors such as size, life cycle, strategy, environment, and technology that influence the structure of organisations. The report concludes by highlighting the importance of these theories and factors in shaping the function and structure of companies.