http://www.entrepreneur.com/article/244176
If there were some way for you to download decades of my experience in the business world and sort through the individuals who have had great success bringing real products to market, you’d find something very interesting.
You’d find a lot of very competent, talented, smart, ingenious, driven people who work very hard at their jobs. And the one thing they care about most is helping to deliver groundbreaking products and services that customers prefer over the competition. One more thing they’d all have in common: a specific area of functional expertise. Whether it’s product development, operations, marketing, finance, or an entire market, there is always one thing they do best. The same is true of nearly every successful entrepreneur you’ve ever heard of: