It happens by default, to whoever understands how everything connects. Everyone knows who to bring a question to, and who can turn a pile of loose information back into something usable. It holds up until that person is buried, or misses something, or wants a week off.
I know that job because I had it. Six years in operations, two of them running parts for an auto dealership, sitting between the dealer management system, the vendor portals, a spreadsheet somebody built in 2019, and the people who needed answers out of all three. Two thousand active part numbers. Fifty to two hundred purchase orders and vendor invoices reconciled every month.
I rebuilt the administrative playbook the department ran on, and it took roughly three hours of unnecessary work out of an eight hour day. I followed the work end to end and wrote down what I found.
That is still the first half of the job. The difference now is that software comes after it.