Which document is crucial for understanding where a tournament has succeeded and where it has not?

The tournament summary is essential for evaluating a tournament's success because it provides a comprehensive overview of the event's outcomes, including attendance numbers, participant feedback, and financial results. This document consolidates various metrics and observations into a single report, allowing stakeholders to identify strengths and weaknesses across different aspects of the tournament. By analyzing this summary, one can assess what strategies or planning elements were effective and which areas require improvement for future events.

The other options, while important, serve different purposes. An event checklist focuses on the logistical aspects of planning and execution, ensuring that all necessary tasks are completed. A budget report offers a detailed look at financial performance, but it may not capture qualitative aspects or participant experiences. A marketing strategy outlines promotional efforts but does not provide a post-event analysis. Thus, while each of these documents has its value, the tournament summary uniquely encapsulates the overall success and areas for growth.