The document compares the waterfall and agile-scrum methodologies. Waterfall is a sequential process where each phase must be completed before moving to the next. It does not allow for revisiting phases or releasing value until the end. Agile-scrum is iterative, rapid, adaptable, quality-driven, and cooperative. Scrum is a lightweight agile process that splits work into small deliverables prioritized in a backlog and estimated in story points. Key scrum elements include sprints, user stories, meetings like daily stand-ups and retrospectives.