You also have the employees gaming the system (at least where I am). The order goes in through the touch screen, then the screen shows your order number as being prepared, and then as ready when it's time to pick up. But since they're judged on how long the customer is waiting, they cheat and mark it as completed long before it actually is, making it disappear from the screen. So now the data shows "wow with just 2 staff we're still serving our meals in 3 minutes" when in reality you have a line of people waiting.