SECI Model

Origin. Ikujiro Nonaka and Hirotaka Takeuchi, "The Knowledge-Creating Company" (1995); later refined with Ryoko Toyama and others.

Mechanism. Knowledge converts between tacit (embodied, difficult to articulate) and explicit (codified, transferable) forms through four modes: Socialization (tacit to tacit: shared experience, apprenticeship), Externalization (tacit to explicit: articulating mental models into concepts), Combination (explicit to explicit: systematizing concepts into knowledge systems), Internalization (explicit to tacit: learning by doing, embodying explicit knowledge). The SECI cycle spirals: each cycle creates new knowledge that enters the next cycle.

Procedure. For Socialization: create shared experiences — joint work, observation, mentorship. Tacit knowledge transfers through co-presence, not documents. For Externalization: use dialogue, metaphor, and analogy to articulate tacit insights into explicit concepts. For Combination: systematize scattered explicit knowledge into structured systems — documents, databases, processes. For Internalization: enable learning by doing — simulations, practice, application of documented knowledge until it becomes tacit skill. Design organizational processes to support all four modes.

Applies to. Innovation management, organizational learning, knowledge transfer, R&D, any context where expertise must be developed, captured, and spread.

Limitations. Organizations often excel at Combination (documentation) while neglecting the other three modes. Explicit knowledge accumulates in repositories no one reads. Tacit knowledge walks out the door when experts leave. The cycle must be complete: if any mode is weak, knowledge creation stalls. Also: not all tacit knowledge can be externalized, and forcing it destroys nuance.