The Small Business Innovation Research (SBIR) program is one of the largest examples of U.S. public-private partnerships. Founded in 1982, SBIR was designed to encourage small business to develop new processes and products and to provide quality research in support of the many missions of the U.S. government, including health, energy, the environment, and national defense. In response to a request from the U.S. Congress, the National Research Council assessed SBIR as administered by the five federal agencies that together make up 96 percent of program expenditures. This book, one of six in the series, reports on the SBIR program at the Department of Energy. It finds that, in spite of resource constraints, the Do E has made significant progress in meeting the legislative objectives of SBIR and that the program is effectively addressing the mission of the Department of Energy. The book documents the achievements and challenges of the program and recommends programmatic changes to make the SBIR program even more effective in achieving its legislative goals.