with King.com, developers of mobile games such as Candy Crush Saga. They told me that they determine which products to build based on real-life user data. They fill a website with prototype games and invite their user base to play them for free. Then, rather than ask for ratings or feedback, they monitor actual usage. They track vast amounts of data about usage—the results tell them which games are the most playable, wanted, and profitable. That being said, gathering data can also be as simple as A-B testing, where you present different versions of a user interaction to 50 percent of the
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