You know the one. Four grand from the supply house, ship-to is a street address, the job field is blank.
Somebody opens it and works out the job from the address, the crew schedule, or a text to the foreman. They pencil in a job number. Then it sits until accounting gets to it.
Every shop does it a little differently, and every version eats part of somebody's afternoon. The job cost report is wrong until it's sorted, and in a busy month there's a stack of them.
The other nine have the job number right on them, and somebody still types them. Open the email, save the file, upload it, key the total, find the job in the list. When the accounting app reads the PDF for them, it guesses the lines and leaves the job blank, so they fix it anyway. The bill with no job number is the hard one. The typed bill is the every-morning one.
The matching part is the same decision every time. That's the part that shouldn't need a person.