Fast food restaurants (or quick service restaurants - QSRs) have changed the way Americans eat. While once the focus was merely on speed, or food served fast to fit with our busy lifestyles, today the QSR business is shifting again, as consumers demand higher quality ingredients and healthier options. While there is a fast food restaurant for just about any type of cuisine, what unites these businesses is a quest for each to offer speedy and uniform service, consistent quality and clean interiors.