The scalar chain refers to the official lines of authority between superiors and subordinates from the highest to the lowest positions.
According to Fayol, organizations should have a chain of authority and communication that extends from top to bottom and is followed by managers and subordinates.
This chain should not be broken; however in an emergency, personnel at the same level can contact their immediate supervisors via GANG PLANK.
Concerning the scalar chain, the term GANG-PLANK is employed. A gang-plank arrangement is one in which two managers working at the same level can interact directly for speedy communication.
If D wants to speak with G, the message will normally travel from D to A via C and B, then from A to G via E and F. However, if quick communication is required, a Gang-Plank (dotted line) can be established between D and G without jeopardizing the chain of command.