Thomas L. Saaty is the creator of the Analytic Hierarchy Process (AHP), a theory for how to establish measures for intangibles most often used in decision making. It has been generalized to the Analytic Network Process (ANP) for decision making with feedback and dependence in networks. The AHP/ANP is particularly useful in group decision making and for handling large-scale multi-criteria decision problems common in business, industry, and government. He holds the chair of Distinguished University Professor at the Pitt Graduate School of Business of the University of Pittsburgh.
In 2008 the Institute of Operations Research and Management Science (INFORMS)recognized him with its Impact Award: "The AHP has revolutionized how we resolve complex decision problems." In 2007 he was awarded the Akao Prize from the International Society of Quality Function Deployment. In 2005 he was elected to the National Academy of Engineering: "For the development and generalization of the analytic hierarchy process and the analytic network process in multicriteria decision-making." The International Society of the Analytic Hierarchy Process (ISAHP.org) was established in 1988 and meets every two years.