TAS has issued a schematic diagram, resembling the London Underground Maps, that traces the various paths the tax return takes, starting with pre-preparation and then through the IRS system of screening, processing, refunds, collections, appeals, litigation and alternatives.
Although. I think the intentions were good, designed to help the taxpayers understand the complexity of how their return is handle, I doubt that many would take the time to work their way through any of the labrynthine schematics, or that any would even be interested.
On the other hand, it might help su explain to clients what is happening with their return.
https://www.irs.gov/pub/irs-pdf/p5341.pdf