US Department of Defence and the History of Waterfall Delivery

TL;DR; The US Department of Defence has moved away from traditional waterfall delivery and now requires lean-agile approaches in its procurement rules, recognizing that agility is essential for complex, high-stakes projects. This shift is now mandated, not just recommended, showing that even large, regulated organizations can make the change. Development managers should reconsider stage-gate processes and focus on enabling real agility rather than clinging to outdated controls.

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