Company Structure:
The typically hierarchical arrangement of lines of authority, communications, rights and duties of an organization is called company structure or organisational structure. It determines how the roles, power and responsibilities are assigned, controlled, and coordinated, and how information flows between the different levels of management.
A typical representation of an organisation structure is shown below:

Managing Director:
A Managing director or CEO is the highest-ranking corporate officer in charge of total management of an organization. An individual appointed as a CEO of a corporation, company, organization, or agency typically reports to the board of directors.
Typically, the CEO/MD has responsibilities as a director, decision maker, leader, manager and executor. The communicator role can involve the press and the rest of the outside world, as well as the organization's management and employees; the decision-making role involves high-level decisions about policy and strategy.
As a leader of the company, the CEO/MD advises the board of directors, motivates employees, and drives change within the organization. As a manager, the CEO/MD presides over the organization's day-to-day operations.
There are different management positions depending upon firms products, and/or Geographic units and of functional executives Chief Operating Officer (COO), Chief Finance Officer (CFO), Chief Information Officer (CIO), Chief Technology Officer (CTO), Chief Revenue Officer (CRO), Chief Visionary Officer (CVO)
Board of Directors:
A board of directors is a body of elected or appointed members who jointly oversee the activities of a company or organization. It is often simply referred to as "the board".
The board is responsible for the success or failure of the company. Furthermore, it is the soul and conscience of the enterprise. If management is