If you want to learn more about the AHP process and metholody: Check out the following arctile written by Dr. Ernest Forman.
Founder of Expert Choice and Chairman, Dr. Forman is also an experienced software developer and consultant on the use of the Analytic Hierarchy Process; and a professor of management science at The George Washington School of Business. He earned a master of management science degree from Johns Hopkins University and a doctor of science in operations research from The George Washington University. He has worked with MITRE Corporation and has served as an advisor to NASA, U.S. Intelligence Agencies, General Motors, Exxon, and Sandoz. His AHP consulting has focused on applications such as resource allocation, benefits-cost analysis, group decision-making and strategic planning.