This document discusses challenge driven innovation and how it compares to conventional innovation. It describes how challenge driven innovation engages a global network of solvers to help companies solve problems, offering financial awards as incentives. This approach provides opportunities to access a wide diversity of solvers from different backgrounds and regions around the world at lower variable costs compared to internal innovation teams. Specific examples are provided of challenges hosted on the InnoCentive platform that have successfully found solutions to problems in various domains like healthcare, aerospace, and government.