When you explain the iterative/incremental nature of Agile, most people coming from a waterfall lifecycle say “What? No up-front planning at all?” Some Agile coaches would glibly say yes, but the truth is more complex. Sprint Zero is an Agile term for a time-boxed amount of up-front planning. During Sprint Zero, you identify value stories, get a decent backlog of user stories and you do some architectural proof-of-concepts. The trick is to balance between insufficient planning and analysis paralysis.
Video Producer: Pillar Technology