What is the key difference between the formal org chart and the informal structure of a company?

• The formal chart shows who has the most seniority, while the informal structure shows who has the most friends.
• The formal chart shows who *can* decide, while the informal structure shows who *actually* influences decisions.
• The formal chart is always accurate, while the informal structure is just gossip.
• The formal chart is only for HR, while the informal structure is for everyone else.