There are several types of organizational structures that companies can adopt. A simple structure has an owner-manager who makes all decisions with informal relationships and communication. A line organization has a direct vertical flow of authority from top to bottom. A line and staff organization combines this direct authority with staff who are experts in specific areas. A functional structure groups employees into departments like marketing, production, and finance. A multi-divisional structure manages diversified products and markets across multiple business units. A matrix structure combines functional and project-based command with dual lines of authority. A network structure uses project groups and collaborations both within and outside the organization to operate in a flexible, non-hierarchical way.