It's harder than it sounds. McDonald's started testing all-day breakfast in a few places in March. To go nationwide, more than 14,300 restaurants in the U.S. needed to install separate griddles and train staff on how to handle breakfast orders simultaneously with lunch and dinner.

McDonald's franchisees say that serving breakfast all-day has been a disaster and slowed down service Twenty-nine operators overseeing 226 locations were surveyed about the new menu addition since it launched last Tuesday Restaurant owners say serving breakfast all-day has forced them to hire more employees, which has increased costs They say it also has sparked chaos in their restaurant's kitchens McDonald's is facing a crisis of confidence according to an internal survey taken among a number of its franchisees.

All Day Breakfast Menu starts October 6, 2015.

McDonald's shook things up when the burger chain launched all-day breakfast Tuesday, extending McMuffins sales past the previous 10:30 A.M. cut off. The move addresses what has been a central complaint among loyal McDonalds customers who want the chain's breakfast options all the time.

As Oct. 6 Approaches, New Elements of McDonald's Campaign Begin McDonald's is staging a major rollout of advertising from multiple agencies, along with digital elements including GIFs, Snapchat filters and a Twitter relay, as it gears up for Tuesday's national launch of All Day Breakfast.

McDonald's is the world's largest chain of hamburger fast food restaurants, serving around 68 million customers daily in 119 countries across 35,000 outlets. Founded in the United States in 1940, the company began as a barbecue restaurant operated by Richard and Maurice McDonald. In 1948, they reorganized their business as a hamburger stand using production line principles.