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Source trail

Evidence behind this lens.

See what shaped the method — and where uncertainty remains.

Taiichi Ohno lens14 sources in the method recordno verified passageDirectly verifiable: PARTIAL
Sources supporting claim 01
Toyota Production System: Beyond Large-Scale Production (Toyota seisan hoshiki, Diamond Inc.; English edition Productivity Press 1988)writing · 1978DirectNo passage is mapped to this claim. Sources are listed for provenance; a quotation appears only when it has been verified for the specific claim.
No public link
Workplace Management (Genba keiei, Japan Management Association; English editions 1988 and, retranslated by Jon Miller, 2007)writing · 1982DirectNo passage is mapped to this claim. Sources are listed for provenance; a quotation appears only when it has been verified for the specific claim.
No public link
TPS Encyclopedia entries on Ohno, genba, jidoka and five-why, compiled from interviews with former Toyota trainers including Isao KatoArt of Lean (Art Smalley) · compilation · undated; retrieved 2026ContextualNo passage is mapped to this claim. Sources are listed for provenance; a quotation appears only when it has been verified for the specific claim.
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