Sai Ram. There are many levels, and sub levels - workmen, supervisors and officers is one classification. Among officers, you again have junior, middle and senior / top management. You also have line managers and staff managers...

In organizations, there are typically three levels of management: top-level, middle-level, and first-level. These three main levels of managers form a hierarchy, in which they are ranked in order of importance. In most organizations, the number of managers at each level is such that the hierarchy resembles a pyramid, with many more first-level managers, fewer middle managers, and the fewest managers at the top level. Each of these management levels is described below in terms of their possible job titles and their primary responsibilities and the paths taken to hold these positions. Additionally, there are differences across the management levels as to what types of management tasks each does and the roles that they take in their jobs. Finally, there are a number of changes that are occurring in many organizations that are changing the management hierarchies in them, such as the increasing use of teams, the prevalence of outsourcing, and the flattening of organizational structures.
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Money, man, material

Top, middle and lower level are the three levels of management. In todays world and more sub-levels and divisions are created for smooth transition of works

The 3 tier system consists of top, middle and bottom line.

Top level, medium level and lower level

Top, middle and lower