Organisation Charts and Manuals: It is essential for efficient management that all members of the organisation clearly understand their authority relationships. Organisation Charts and Manuals are useful means or providing information about organisational relationships.Meaning of organisation Chart: An organisation chart is a graphical presentation of the various positions in the enterprise and the formal relationships among them. An organisation Chart shows graphically the managerial positions and interrelationships in an enterprise. It is a blue print of the companys organisation structure. According to George Terry - an organisational chart is a diagrammatical form, which shows important aspects of an organisation including the major functions and their respective relationships, the channels of supervision, and the relative authority of each employee who is in-charge of each respective function.Types of organisation Charts:There are several kinds of organisation charts, important among them are given below:1. Vertical Chart 2. Horizontal Chart1. Vertical Charts:It shows the organisation structure in the form of a pyramid. The lines of command proceeding from top to bottom in vertical lines.