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Executive Summary

AI promises faster, cheaper, safer IT modernization – but applied generically, it delivers brittle code and cost overruns. This joint BCG and CAST white-paper maps the six myths that most often derail AI-based modernization, and what leaders should do instead.

Learn about:

  • How the right AI, matched to task and context, cuts modernization costs 25%-35% and speeds implementation 30%-40%.
  • Why modernization should be a selective, value-led transformation focused on critical systems and business outcomes - not a blanket technical upgrade.
  • How AI can accelerate every stage of modernization when given the right context, applied to the right tasks, and kept within strong engineering guardrails.

Authors

Julien MarxBCG
Julien Marx

Managing Director & Partner

Michael FraserBCG
Michael Fraser

Managing Director & Partner

Jean-François BobierBCG
Jean-François Bobier

Partner & Vice President, Deep Tech

Fabrice BardonBCG
Fabrice Bardon

Director, BCG Platinion

Charles GrenetBCG
Charles Grenet

Architecture Director, BCG Platinion

Vincent DelarocheCAST
Vincent Delaroche

Founder & Chairman of the Board