Job classification is an internal layout of ranking employees according to their position, specialization, profile and duties. It helps one to understand to which group employees belong and what tasks they can perform. It is worth emphasizing that job classification and organizational structure are not equivalent concepts. The organizational structure defines the department, project and subordination (manager and subordinates) of an employee. Classification, on the other hand, assigns employees to ranks.
Ranks can include top management, specialists, ordinary employees, workers, technicians, and contractors. Classification options may also vary; sometimes employees are divided into levels of expertise from elementary to expert, or, for example, into "Operational and technical personnel", "Specialists", and "Managers and supervisors" groups.