What a cleaning checklist on the door does not tell you
A cleaning log on the back of a door shows that staff stopped by. It does not show what the space is like for the person using it. At peak times, a restroom can be in poor shape again half an hour after cleaning, and the first person to notice is the visitor.
Hygiene assessment collects that signal at the source. Visitors scan the QR code on the door and rate the space. You make decisions based on the result people experience, not only on whether a round was logged.