The basic feature of bureaucratic organisation is that there is hierarchy of positions in the organisation. Hierarchy is a system of ranking various positions in descending scale from top to bottom of the organisation. In bureaucratic organisation, offices also follow the principle of hierarchy that is each lower office is subject to control and supervision by higher office.
Thus, no office is left uncontrolled in the organisation. This is the fundamental concept of hierarchy in bureaucratic organisation. This hierarchy serves as lines of communication and delegation of authority. It implies that communication coming down or going up must pass through each position.
Similarly, a subordinate will get authority from his immediate superior. However, this hierarchy is net unitary but sub-pyramids of officials within the large organisation corresponding etc. functional divisions exist.
Thus, there are offices with the same amount of authority but with different kinds of functions operating in different areas of competence. For example, the Government organisations, we can observe separate offices looking after particular functions. This happens in business organisations too.