The document discusses the evolution of project management from traditional "Stone Age" practices to more modern DevOps approaches. In the Stone Age, project managers focused on tasks like planning and budgeting, but often did not collaborate well with developers. During the Renaissance, shared understanding between teams improved estimation. Now in the DevOps era, project managers act as delivery enablers, facilitating communication across teams and advocating for continuous improvement and risk management practices. The role has shifted from command and control to helping teams work together effectively.
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