Custom Challenge Programs seek to improve the innovation system within a given sector by providing a forum and focus for a Solver community, fostering collaboration, cooperation, and networking among innovators and other key stakeholders, and improving information-sharing, knowledge transfer, and communication within the community. Launching a Custom Challenge Program can raise the profile of the program sponsor and its cause, helping to establish thought leadership within an industry or around an important issue. And for foundations, these programs are effective fundraising vehicles. Because Custom Challenge Programs tend to demand radical thinking and breakthrough innovations, it is especially important to attract new and original ideas from outside traditional sectors. These programs often make an extra effort to engage new innovators and offer sub-prizes that reward technology-transfer from external sectors. Custom Challenge Programs can be used to open up whole new markets or new areas of innovation, as radical advances open up fresh avenues of commercial opportunity and enable a diverse range of sequential innovations.