A McDonald's Big Mac will look and taste the same in Los Angeles as in Paris, although certain variations involving local prohibitions and different seasonings have crept into the product line as McDonald's has expanded its world reach. Economies of scale are obtained through large scale purchases of food, equipment, and advertising time as well as efficencies gained by as assembly-line production process among the front-line employees. Additional savings may be forthcoming it the parent company monitors inventories, revenue management, and manpower scheduling.