What does organizational structure mean? According to the Investopedia website the definition of organizational structure is  "Explicit and implicit institutional rules and policies designed to provide a structure where various work roles and responsibilities are delegated, controlled and coordinated. Organizational structure also determines how information flows from level to level within the company. In a centralized structure, decisions flow from the top down. In a decentralized structure, the decisions are made at various different levels." However, any organization should have the right organizational (managerial) structure which makes the business process easier and interesting. Any organization has 4 main departments which are Marketing, Human resources, Finance and operations management. Now we will see the 3 organizational structure levels diagram.