What was the McDonald's operating system called after the brothers redesigned their restaurant in 1948?

The McDonald brothers called their redesigned 1948 operating model the Speedee Service System.

The system replaced much of the traditional drive-in approach with counter service and a tightly limited menu. Hamburgers, fries, and milkshakes became central, while standardized preparation helped the restaurant serve food quickly and consistently.

The word “Speedee” connected the system with speed and also echoed the early Speedee mascot. Ray Kroc later recognized that this highly repeatable method could be used across franchised restaurants. The system was an important foundation for McDonald's branding because customers encountered the same menu, service style, and visual identity at different locations.