This volume, a part of the Elements of Mathematics Program (EM), provides the student with an experience in developing a mathematical model for a "real-life" situation. After discussing the process of mathematization by reference to geometry, and presenting a flow-chart diagram describing the relationship of mathematical models to real situations, the book focuses on a single problem, the mathematization of the voting process of decision-making bodies. The analysis of this problem requires knowledge of set theory and logic (including quantifiers) and a facility with concepts such as relation, functions, and ordered n-tuple, studied in other EM volumes. (SD)