A useful informal framework for monitoring intoxication considers a customer's:

A useful informal framework for monitoring intoxication is to watch for changes over time in a customer's speech (slurring), coordination (balance, dexterity), behavior (becoming loud, aggressive, or unusually subdued), and judgment (poor decisions, lowered inhibitions). Tracking these categories helps a server notice when a customer is becoming impaired even before any single sign is dramatic. Because intoxication shows up across multiple dimensions, observing several of them together gives a more reliable picture than focusing on just one.