Organisation charts can be prepared in different forms. However, all organisation charts may be classified into three broad categories:
1. Vertical Chart:
This is the most widely used form. It shows the organisation structure in the form of a pyramid, the lines of command proceeding from top to bottom in lines. The highest position or person is placed at the top and after that the next highest. This process goes on up to the lowest level.
2. Horizontal Chart:
In a horizontal chart the pyramid lies horizontally instead of standing vertically. The highest position is shown at the extreme left and the lowest position at the extreme right. In between each successive sub-ordinate position extends from left to right. Therefore, this chart is also called Left to Right chart.
3. Circular Chart:
In a circular chart, the highest position is shown in the centre and the lowest position at the outermost circle. Positions at successive echelons extend in all directions outward from the centre.
Distance of a position from the centre indicates the degree of closeness to the top position. Positions of equal status lie at the same distance from the centre. This form is, however, rarely used.