> It's really hard to design products by focus groups. A lot of times, people don't know what they want until you show it to them. - Steve Jobs But it depends

> It's really hard to design products by focus groups. A lot of times, people don't know what they want until you show it to them. - Steve Jobs But it depends on how new your product is; e.g. Macdonald's can calculate demand for new store locations.