The CTO Substack

The CTO Substack

The CTO’s Methodological Pivot

How AI is forcing CTOs to rethink everything they believed about Agile and Waterfall

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Etienne de Bruin
Jan 23, 2026
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In August 1970, Winston Royce stood before an audience at IEEE WESCON and presented a paper that would be misquoted for the next fifty years. His eleven-page document, “Managing the Development of Large Software Systems,” contained a diagram showing a sequential flow from requirements to operations. That diagram, later dubbed “waterfall,” became the pos…

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