An organization is a social unit of people that is structured and managed to meet goals on an ongoing basis. Organizations have management structures that determine relationships between functions, positions, roles, and responsibilities. The organizational structure provides a framework for lines of authority, communication, and allocation of duties. There are different types of organizational structures such as tall, flat, virtual, and boundaryless that impact effectiveness, efficiency, communication, and performance. Organizational structures are important for coordinating work, defining responsibilities, and establishing relationships within an organization.