A stepstone was the kitchen designed in Frankfurt by Margarethe Schütte-Lihotzky. Working-class women frequently worked in factories to ensure the family's survival, as the men's wages often did not suffice. Social housing projects led to the next milestone: the Frankfurt Kitchen. Developed in 1926, this kitchen measured 1.9 m by 3.4 m (approximately 6 ft 2 in by 11 ft 2 in, with a standard layout). It was built for two purposes: to optimize kitchen work to reduce cooking time and lower the cost of building decently equipped kitchens. The design, created by Margarete Schütte-Lihotzky, was the result of detailed time-motion studies and interviews with future tenants to identify what they needed from their kitchens. Schütte-Lihotzky's fitted kitchen was built in some 10,000 apartments in the housing projects erected in Frankfurt in the 1930s.