What was the name of McDonald’s fast-service operating system launched when the brothers reopened in 1948?

McDonald’s fast-service operating system launched when the brothers reopened in 1948 was called the Speedee Service System.

Richard and Maurice McDonald developed the system after closing their San Bernardino restaurant and simplifying its menu. They emphasized standardized preparation, limited choices, counter service, and rapid production rather than traditional carhop service.

The system helped establish principles that became central to modern fast food: predictable portions, repeatable procedures, and efficient kitchen layouts. The restaurant’s early Speedee branding also featured a chef-like character named Speedee, although that mascot was later replaced in prominence by the Golden Arches.

Speedee Service System refers to the operating concept, not merely the company’s early mascot. The two are related because both used the Speedee name, but the system describes the restaurant method that became the foundation for McDonald’s growth.