The document compares waterfall and agile approaches to business intelligence (BI) projects. Waterfall aims to prevent scope changes but can result in long timelines to delivery, while agile embraces scope changes to focus on quick delivery of business value. Agile BI allows for iterative development and prototyping for user feedback, fast time to value, and flexibility to changing requirements compared to deterministic data warehousing. The implications of adopting agile BI over waterfall BI include more frequent releases, less documentation, and an emphasis on immediate feedback. The document recommends using agile for situations where requirements are unknown or changing rapidly.