A flowchart with data.
Here's the same diagram, but with linked data telling you how many orders are pending in each department. With data, you can identify trends, exceptions, or problems. For example, here it looks like there's a problem with the Warehouse department: 24 orders are waiting to be processed. Maybe it's time to improve that process or find out what the problem is.
You may be thinking, "Why would I use Visio to look at and analyze data? After all, worksheets and database reports can give me this information." Yes, that's true. But Visio really shows you your data, in a strongly visual context. Why not have the best of both worlds: the power of Visio diagrams and detailed data analysis all in one?