I have asked the following question on stackoverflow around modeling an org chart. This focused on the DB modeling details, etc but I want to ask a related question here focusing purely on the user experience. (I do believe that its an independent question on its own but thought it would be useful to give the reference of the modeling question on SOF)
If a person has multiple responsibilities in an organization, is it expected that he will show up multiple times on the org chart or the org will update its "shape" to show that person one time?
Again, this is focused purely around trying to understand expected visualization expectations (although if you have ideas around the modeling in the other question, feel free to add answers and comments to that question :) )