What was the name of McDonald's original 1948 service system that emphasized speed and limited menus?

McDonald's original 1948 service system was called the Speedee Service System.

Richard and Maurice McDonald introduced the system after reorganizing their San Bernardino, California, restaurant. They reduced the menu, standardized preparation, and arranged the kitchen like an assembly line so food could be produced quickly and consistently.

The system helped establish the operating model later associated with fast food. It also supplied the name and imagery for Speedee, an early McDonald's mascot who represented rapid service.

The Speedee Service System predates Ray Kroc's expansion of McDonald's into a major chain. Kroc became involved in the 1950s and helped franchise and scale the brothers' approach, but the original system was developed by the McDonald brothers in 1948.