Organizational structure types
I. Pre-bureaucratic structure
II. Bureaucratic structure
III. Post-bureaucratic structure
IV. Functional structure
V. Divisional structure
a) weak/functional matrix
b) balanced/functional matrix
c) strong/project matrix
VII. Structure of the companies
a) team structure
b) network structure
c) virtual structure
 Pre-bureaucratic structures
Pre-bureaucratic (entrepreneurial) structures lack standardization of tasks. This structure is most common in smaller organizations and is best used to solve simple tasks. The structure is totally centralized. The strategic leader makes all key decisions and most communication is done by one on one conversations. It is particularly useful for new (entrepreneurial) business as it enables the founder to control growth and development.
They are usually based on traditional domination or charismatic domination in the sense of Max Weber's tripartite classification of authority
 Bureaucratic structures
Weber (1948, p. 214) gives the analogy that “the fully developed bureaucratic mechanism compares with other organizations exactly as does the machine compare with the non-mechanical modes of production. Precision, speed, unambiguity, … strict subordination, reduction of friction and of material and personal costs- these are raised to the optimum point in the strictly bureaucratic administration.” Bureaucratic structures have a certain degree of standardization. They are better suited for more complex or larger scale organizations, usually adopting a tall structure. The tension between bureaucratic structures and non-bureaucratic is echoed in Burns and Stalker's distinction between mechanistic and organic structures.
The Weberian characteristics of bureaucracy are:
• Clear defined roles and responsibilities
• A hierarchical structure
• Respect for merit.
The term of post bureaucratic is used in two senses in the organizational literature: one generic and one much more specific. In the generic sense the term post bureaucratic is often used to describe a range of ideas developed since the 1980s that specifically contrast themselves with Weber's ideal type bureaucracy. This may include total quality management, culture management and matrix management, amongst others. None of these however has left behind the core tenets of Bureaucracy. Hierarchies still exist, authority is still Weber's rational, legal type, and the organization is still rule bound. Heckscher, arguing along these lines, describes them as cleaned up bureaucracies, rather than a fundamental shift away from bureaucracy. Gideon Kunda, in his classic study of culture management at 'Tech' argued that 'the essence of bureaucratic control - the formalisation, codification and enforcement of rules and regulations - does not change in principle.....it shifts focus from organizational structure to the organization's culture'.
Another smaller group of theorists have developed the theory of the Post-Bureaucratic Organization., provide a detailed discussion which attempts to describe an organization that is fundamentally not bureaucratic. Charles Heckscher has developed an ideal type, the post-bureaucratic organization, in which decisions are based on dialogue and consensus rather than authority and command, the organization is a network rather than a hierarchy, open at the boundaries (in direct contrast to culture management); there is an emphasis on meta-decision making rules rather than decision making rules. This sort of horizontal decision making by consensus model is often used in housing cooperatives, other cooperatives and when running a non-profit or community organization. It is used in order to encourage participation and help to empower people who normally experience oppression in groups.
Still other theorists are developing a resurgence of interest in complexity theory and organizations, and have focused on how simple structures can be used to engender organizational adaptations. For instance, Miner et al. (2000) studied how simple structures could be used to generate improvisational outcomes in product development. Their study makes links to simple structures and improviseal learning. Other scholars such as Jan Rivkin and Sigglekow, and Nelson Repenning  revive an older interest in how structure and strategy relate in dynamic environments.
 Functional structure
Employees within the functional divisions of an organization tend to perform a specialized set of tasks, for instance the engineering department would be staffed only with software engineers. This leads to operational efficiencies within that group. However it could also lead to a lack of communication between the functional groups within an organization, making the organization slow and inflexible.
As a whole, a functional organization is best suited as a producer of standardized goods and services at large volume and low cost. Coordination and specialization of tasks are centralized in a functional structure, which makes producing a limited amount of products or services efficient and predictable. Moreover, efficiencies can further be realized as functional organizations integrate their activities vertically so that products are sold and distributed quickly and at low cost. For instance, a small business could start making the components it requires for production of its products instead of procuring it from an external organization.But not only beneficial for organization but also for employees faiths.
 Divisional structure
Also called a "product structure", the divisional structure groups each organizational function into a division. Each division within a divisional structure contains all the necessary resources and functions within it. Divisions can be categorized from different points of view. One might make distinctions on a geographical basis (a US division and an EU division, for example) or on product/service basis (different products for different customers: households or companies). In another example, an automobile company with a divisional structure might have one division for SUVs, another division for subcompact cars, and another division for sedans.
Each division may have its own sales, engineering and marketing departments.
 Matrix structure
The matrix structure groups employees by both function and product. This structure can combine the best of both separate structures. A matrix organization frequently uses teams of employees to accomplish work, in order to take advantage of the strengths, as well as make up for the weaknesses, of functional and decentralized forms. An example would be a company that produces two products, "product a" and "product b". Using the matrix structure, this company would organize functions within the company as follows: "product a" sales department, "product a" customer service department, "product a" accounting, "product b" sales department, "product b" customer service department, "product b" accounting department. Matrix structure is amongst the purest of organizational structures, a simple lattice emulating order and regularity demonstrated in nature.
• Weak/Functional Matrix: A project manager with only limited authority is assigned to oversee the cross- functional aspects of the project. The functional managers maintain control over their resources and project areas.
• Balanced/Functional Matrix: A project manager is assigned to oversee the project. Power is shared equally between the project manager and the functional managers. It brings the best aspects of functional and projectized organizations. However, this is the most difficult system to maintain as the sharing power is delicate proposition.
• Strong/Project Matrix: A project manager is primarily responsible for the project. Functional managers provide technical expertise and assign resources as needed.
Among these matrixes, there is no best format; implementation success always depends on organization's purpose and function.
 Organizational circle: moving back to flat
The flat structure is common in enterprenerial start-ups, university spin offs or small companies in general. As the company grows, however, it becomes more complex and hierarchical, which leads to an expanded structure, with more levels and departments.
Often, it would result in bureaucracy, the most prevalent structure in the past. It is still, however, relevant in former Soviet Republics and China, as well as in most governmental organizations all over the world. Shell Group used to represent the typical bureaucracy: top-heavy and hierarchical. It featured multiple levels of command and duplicate service companies existing in different regions. All this made Shell apprehensive to market changes, leading to its incapacity to grow and develop further. The failure of this structure became the main reason for the company restructuring into a matrix.
Starbucks is one of the numerous large organizations that successfully developed the matrix structure supporting their focused strategy. Its design combines functional and product based divisions, with employees reporting to two heads. Creating a team spirit, the company empowers employees to make their own decisions and train them to develop both hard and soft skills. That makes Starbucks one of the best at customer service.
Some experts also mention the multinational design, common in global companies, such as Procter & Gamble, Toyota and Unilever. This structure can be seen as a complex form of the matrix, as it maintains coordination among products, functions and geographic areas.
In general, over the last decade, it has become increasingly clear that through the forces of globalization, competition and more demanding customers, the structure of many companies has become flatter, less hierarchical, more fluid and even virtual.
One of the newest organizational structures developed in the 20th century is team. In small businesses, the team structure can define the entire organization. Teams can be both horizontal and vertical. While an organization is constituted as a set of people who synergize individual competencies to achieve newer dimensions, the quality of organizational structure revolves around the competencies of teams in totality. For example, every one of the Whole Foods Market stores, the largest natural-foods grocer in the US developing a focused strategy, is an autonomous profit centre composed of an average of 10 self-managed teams, while team leaders in each store and each region are also a team. Larger bureaucratic organizations can benefit from the flexibility of teams as well. Xerox, Motorola, and DaimlerChrysler are all among the companies that actively use teams to perform tasks.
Another modern structure is network. While business giants risk becoming too clumsy to proact (such as), act and react efficiently, the new network organizations contract out any business function, that can be done better or more cheaply. In essence, managers in network structures spend most of their time coordinating and controlling external relations, usually by electronic means. H&M is outsourcing its clothing to a network of 700 suppliers, more than two-thirds of which are based in low-cost Asian countries. Not owning any factories, H&M can be more flexible than many other retailers in lowering its costs, which aligns with its low-cost strategy. The potential management opportunities offered by recent advances in complex networks theory have been demonstrated  including applications to product design and development, and innovation problem in markets and industries.
A special form of boundaryless organization is virtual. Hedberg, Dahlgren, Hansson, and Olve (1999) consider the virtual organization as not physically existing as such, but enabled by software to exist. The virtual organization exists within a network of alliances, using the Internet. This means while the core of the organization can be small but still the company can operate globally be a market leader in its niche. According to Anderson, because of the unlimited shelf space of the Web, the cost of reaching niche goods is falling dramatically. Although none sell in huge numbers, there are so many niche products that collectively they make a significant profit, and that is what made highly innovative Amazon.com so successful.