A good organizational chart displays and defines roles. It defines the path of information and decision making. It tells you who does what.
This is an important tool in developing processes and standards-based management (which is the root of managing for growth). You can’t make a plan, much less execute it, without knowing what everyone does. The org chart is like an old fashioned program at a baseball game. It tells you who all the players are and what position they play.
An org chart helps point you in the direction of where improvements can come from. It spells out who is responsible for defining a process or work-flow for other people. And to use a thought from the linchpin world, it can show you who is doing something new and unique, or on their own.