scrum agile global scrum gathering agile software development tdd agile engineering extreme progamming xp test driven development tuckman model self-organization product backlog refinement product backlog items user stories high performance teams self-managing teams self-managing self-organizing teams continuous improvement quality product product increment definition of done progressive elaboration user story splitting velocity metrics technical coaching ensemble programming mob programming pair programming 2020 scrum guide dsdm adaptive software development lightweight fdd crystal agile manifesto history behavoir driven development bdd drexler/sibbet team performance model delegation board delegation poker situational leadership dreyfus model shuhari management 3.0 delegation test strategy automated testing atdd testing splitting stories lean ux lean devops continuous deployment cicd technical debt soñar clean code bad code
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