agile scrum scrum master product owner high performing teams agile games innovation value project selection wsjf time cost value realization weighted shortest job first efficiency incremental ceremonies backlog passion how-to inspiration community velocity software development simulation metrics case study burndown chart health agile relative estimation sizing stories user scru lessons learned outcomes scrum values building trust remote teams distributed teams team alliance agility health team health working agreements batches workflow product backlog user stories work-in-process gridlock wip sprints agile beyond software safety value-streams retrospective roles scrum mechanics sprint review artifacts agile manifesto iterative
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