What information does the ECET use to determine event profitability?

The correct choice highlights that both revenue and costs are essential factors in determining the profitability of an event. To assess profitability accurately, it is crucial to analyze the total revenue generated by the event in relation to the total costs incurred during its execution. Revenue provides insight into the income generated from ticket sales, sponsorships, merchandise, and any other sources, while the cost includes all expenses associated with planning and running the event, such as venue rental, staffing, marketing, and materials.

By examining both revenue and costs together, organizations can calculate the net profit or loss, giving a clear picture of the event's financial health. This dual perspective is foundational in financial analysis and decision-making, enabling event planners to understand whether their efforts resulted in a beneficial financial outcome or required adjustments for future events.

When considering the other options, while participant satisfaction scores are important for the overall success and reputation of an event, they do not directly affect the calculation of profitability. Focusing solely on revenue or costs independently does not provide a complete view of financial performance, as it's the interplay between these two elements that ultimately determines whether the event was profitable.