Why did Ray Kroc's restaurants switch to frozen french fries?

Ray Kroc’s restaurants switch to frozen French fries because frozen fries have the same size and the restaurant workers will not spend too much time on working peeling every potato to have quality fries. Raymond Albert Kroc is an American businessman that opened / franchised McDonald’s. His goal is to provide quality service and uniformity in all McDonald’s stores. McDonald’s became the most successful fast food chain / corporation in the world because of Mr. Kroc’s innovative ideas.