The document introduces decision analysis and uses selecting a U.S. presidential candidate as an example. It outlines the process of decision analysis, including identifying needs and wants. For presidential candidates, needs include meeting the constitutional requirements of age, citizenship status and term limits. Wants may include a candidate's values, experience and education level. The document provides details on the qualifications for U.S. president from the constitution and analyzes some potential 2016 Republican candidates using decision analysis.