RFID table tracking helping fast casuals get orders out quickly, accurately

It's a familiar scene. The dining room is crowded, a sea of guests at tables awaiting the arrival of their food. Numbered cards pop up from tables, and crew members crane their necks, searching the the number that matches the order they are carrying. But the card is turned at an odd angle, or has fallen off the card holder, or is being gnawed on by the guest's baby. So the crew member circles the dining room frantically searching while the soup on her tray cools. That scene may be fading in some fast casuals, thanks to new technology that leads the crew member directly to the guests table.