The rise of the studio system through the 1920s and 1930s provided extraordinarily fertile ground for developing movie genres. During that time, the economic model of Fordism increased the amount and quality of output through the division of labor and the mass production of parts. As a result of that increased output, cost would decrease and, ideally, consumption of the product would increase. Tied to a studio system that adapted this industrial system of mass production, film genres enabled movie producers to reuse script formulas, actors, sets, and costumes to create, again and again, many different modified versions of a popular movie. The most famous Hollywood studios differed in size, strategies, and styles, but each used a production system based on the efficient recycling of formulas and conventions, stars, and sets.