The attention to running an efficient and lean business model gives Brickworks Limited ( ASX: BKW ) its own comparative advantage by being a low cost producer of bricks and other building materials. Its leverage to higher volumes is also important and with data suggesting home building is set to grow, the outlook for Brickworks is positive. Despite some significant shareholder destruction in the form of the Viridian acquisition, CSR Limited ( ASX: CSR ) has done a good job at creating value-added products which command a price premium for the benefit of shareholders. These products include the Gyprock and Monier brands. Much like Brickworks, Amcor Limited ( ASX: AMC ) also runs an efficient operation which creates a form of comparative advantage. With global operations, Amcor can leverage its buying power and customer relationships to be a low cost producer of packaging solutions.