A team working on a project is like a martial artist fighting a big crowd of opponents. That “final product service or result” can look quite overwhelming. The crowd looks menacing, big, and hard to defeat. The agile approach is incremental approach. It’s flow and movement that matter. Real masters do it sequentially and position themselves in such a way that they never have to face more than one opponent. Limit your work in progress. Work on one product backlog item - one opponent at a time. Pretty soon there are no more “opponents” left - the product backlog is empty and the project is delivered. Just don't get stuck anywhere!