What was the name of McDonald's early service system introduced in 1948?

McDonald's early service system introduced in 1948 was called the Speedee Service System.

Richard and Maurice McDonald reorganized their San Bernardino restaurant around a restricted menu, standardized portions, and assembly-line preparation. This approach reduced waiting time and made it easier to reproduce the same operating model in other locations.

The word “Speedee” also appeared in the restaurant's early mascot and branding. That connection explains why the first mascot looked like a chef and why early McDonald's identity emphasized speed rather than the family characters used later.

The system is often described as a foundation of modern fast food. It was not simply a slogan or a logo: it was an operating method that linked kitchen workflow, menu design, service speed, and consistency. Ray Kroc later expanded the business through franchising, but the original system came from the McDonald brothers.