In TV sets, for example, cost leadership requires efficient size picture tube facilities, a low-cost design, automated assembly, and global scale over which to amortize R&D. In security guard services, cost advantage requires extremely low overhead, a plentiful source of low-cost labor, and efficient training procedures because of high turnover. Low-cost producer status involves more than just going down the learning curve. A low-cost producer must find and exploit all sources of cost advantage. Low-cost producers typically sell a standard, or no-frills, product and place considerable emphasis on reaping scale or absolute cost advantages from all sources.