Noun
a chart showing the lines of responsibility between departments of a large organization
Source: WordNet... the organization chart will initially reflect the first system design, which is almost surely not the right one [... ] as one learns, he changes the design [... ]. Management structures also need to be changed as the system changes... Fred Brooks
Life is like a cobweb, not an organization chart. Ross Perot
In most companies, the formal hierarchy is a matter of public record - it's easy to discover who's in charge of what. By contrast, natural leaders don't appear on any organization chart. Gary Hamel