Event evaluation is an essential management function that allows organizations to improve processes, more effectively achieve goals, and learn and adapt. It involves holistically assessing an event using a broad range of measures and approaches to determine its value and impacts within a given context. For the events sector, evaluation is critical to ensure success from different stakeholder perspectives and is often tied to certification required by funders and rights-granting bodies. Models used in event evaluation assess economic, social, environmental, and cultural impacts, and identify costs and benefits to determine positive and negative effects on host communities.