What name did McDonald's use for its early rapid-service operating system?

McDonald's used the name Speedee Service System for its early rapid-service operating system.

The system was developed by Richard and Maurice McDonald when they reorganized their restaurant in San Bernardino, California. Their approach simplified the menu, standardized preparation, arranged kitchen tasks efficiently, and emphasized serving food quickly and consistently.

The Speedee Service System became an important foundation of the modern fast-food model. Rather than operating like a traditional drive-in with a broad menu and carhop service, the McDonald brothers focused on a limited selection of items that could be produced rapidly. The system also helped make the restaurant easier to replicate through franchising.

The name is connected to Speedee, the company's early chef mascot, which is why the two are sometimes treated as the same thing. Speedee was the character; the Speedee Service System was the operating method represented by the character.