The document discusses the history and strategies of General Motors (GM) over time. It describes Henry Ford's early strategy of low costs and mass production of a single model. It then explains Alfred Sloan's strategy at GM of product differentiation between brands like Chevrolet, Pontiac, and Cadillac. However, GM began facing problems as their cars lacked experience with small cars and lean production. The oil crisis and Japanese competition further harmed GM, who then worked to improve quality, reduce costs, and restore profitability.