This report discusses the decision-making tools and techniques used for organizing an expo event at The Australian National University. It explores the usefulness of rational decision-making, decision support systems, and the PARETO decision-making tool. It also compares and evaluates different sources of data for decision-making and examines decision-making systems for group decisions. Additionally, it critically examines emerging tools and technologies for decision-making. The report provides insights into the decision-making process for sustainable outcomes.