century this type of organization, eg in the transportation industry, services (ingénierie. ..) or alongside large groups, independent of their own work tool (eg, trucks, barges or barges ) and find their buyers through brokers. With the industrial revolution, entrepreneurs change, they equip themselves with machines and workers maintain the same time, giving birth to companies in the traditional sense. In the modern economy, where services have taken precedence over industry, the concept of employee also took precedence over that of worker.

A company based on a number of vital functions that ensure its functioning. Henri Fayol has identified six technical, commercial, financial, security, accounting (informational), administrative (management). Generally, companies establish a hierarchy among their employees: those located at a lower level (eg, teammates, colleagues, employees ...) obey those at a higher level (managers, executives, project managers .. .). This hierarchical organization is combined with a specialization in activities in the organizational structure of the company.