Stuart Dreyfus

Researcher

A mathematician, not a management scholar: professor emeritus of operations research at Berkeley who co-authored Applied Dynamic Programming, a foundational text of the field, with Richard Bellman at RAND. With his older brother Hubert, a philosopher, he built the Dreyfus model of skill acquisition (the basis for MC's Dreyfus Model) to argue about artificial intelligence, not to teach managers.

Born
1931

Stuart E. Dreyfus is professor emeritus of industrial engineering and operations research at the University of California, Berkeley.[1] At the RAND Corporation he programmed the JOHNNIAC computer and co-authored Applied Dynamic Programming with Richard Bellman; dynamic programming, his central field, is one of the mathematical foundations of the reinforcement learning behind modern AI.[1]

With his older brother Hubert, a philosopher, he built the Dreyfus model of skill acquisition, first set out in their 1980 report for the Air Force.[2] He later argued, in his account of “System 0,” that expert intuition is the brain’s procedural memory learning by trial, feedback, and reward, the same reinforcement-learning mechanism his own mathematics helped give the machines.[3] His own summary of the position is blunt: “Expertise is pattern discrimination and association based on experience. It is intuitive. There is no evidence you can reduce it to rules and theory. Hence, Artificial Intelligence probably can’t be produced using rules and principles. That’s not what intelligence is.”[4]

1
"Stuart Dreyfus," Wikipedia, accessed July 27, 2026.
https://en.wikipedia.org/wiki/Stuart_Dreyfus
2
Stuart E. Dreyfus and Hubert L. Dreyfus, A Five-Stage Model of the Mental Activities Involved in Directed Skill Acquisition, ORC 80-2 (Berkeley: Operations Research Center, University of California, Berkeley, 1980).
https://apps.dtic.mil/sti/tr/pdf/ADA084551.pdf
3
Stuart E. Dreyfus, "System 0: The Overlooked Explanation of Expert Intuition," in Handbook of Research Methods on Intuition, ed. Marta Sinclair (Cheltenham: Edward Elgar, 2014).
https://escholarship.org/uc/item/7nk534tm
4
"Stuart Dreyfus," UC Berkeley Industrial Engineering & Operations Research Department, accessed July 27, 2026.
https://ieor.berkeley.edu/people/stuart-dreyfus/
5
"Dreyfus model of skill acquisition," Wikipedia, accessed July 28, 2026.
https://en.wikipedia.org/wiki/Dreyfus_model_of_skill_acquisition
6
"Hubert Dreyfus," Wikipedia, accessed July 28, 2026.
https://en.wikipedia.org/wiki/Hubert_Dreyfus

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Dreyfus ModelToolEvery skill runs on a ladder from novice to expert, with a sixth rung, mastery, for those who push further, and where you sit changes how you learn it and how you should be coached. The Dreyfus model is the map: name the rung, name the next one, and the vague feedback that helps no one turns into a plan.