From the blog of Arthur Charpentier, Somewhere Else, part 142
(departing from London, ht http://mapsontheweb.zoom-maps.com/ ) by Francis Galton, 1881
A much larger image that is easier to read.
Although not on such a grand scale, an isochronic passage map for data could be interesting for your enterprise.
How much time does elapse from your request until a response from another department or team?
Presented visually, with this map as a reference for the technique, your evidence of data bottlenecks could be persuasive!