LogFAQs > #928753054

One reason they do this is that the drive through has expected average time for delivery. When they ask you to pull away they can mark yours done and bring the next people up.

My local McDonalds in the morning never puts my order in when Im at the speaker. They do it when I get to the window then cash it out and hit done. So its literally like a 5 second time. It brings down the averages for later in the day when it does get busy.