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Principle of Scalar Chain and Gang plank
The formal lines of authority from highest to lowest ranks are known as scalar chain. According to Fayol,
“Organisation should have a chain of authority and communication that runs from top to bottom and should be followed by managers and subordinates.”
In the diagram, O is heading 2 teams where A and X are at the same level, B and Yare at the same level and C and Zare at the same level. The line of communication is clearly defined A to B to C and Xto Y to Z. Authority responsibility relationship is also very clear. But C and Z cannot directly contact each other. This some times may take lot of time during an emergency to communicate as per the prescribed flow to avoid this problem a system known as ‘Gang Plank’ was introduced where in C or Z could contact each other and same way B and Y could contact each other.