How do large and small organizations use organization charts differently?

For most large organizations, for example, Kellogg's, ExxonMobil or Procter they do not maintain a detailed or completed organizational chart.

• First, charting is difficult even for a few relative positions implying that for larger organizations charting will be close to ambiguous.
• Secondly, larger organizations are known to change segments of their organizational structures. In most cases, an organization chart structure would be updated even before it was completed. What helps such organizations is technology, systems that can be able to detect updates and implement them automatically.