Most manufacturing companies manage knowledge transfer informally. The SECI model makes that process visible, structured, and manageable.

Developed by Ikujiro Nonaka and Hirotaka Takeuchi and described by ASCN’s (Accelerating Systemic Change Network) knowledge management resources, the SECI model identifies four distinct modes of knowledge conversion.

• Socialization is tacit knowledge passing between people through shared experience, the apprenticeship model, the veteran operator working alongside a newer hire on the floor.
• Externalization is the conversion of that tacit knowledge into explicit knowledge: a procedure, a checklist, a documented guide that captures the steps and the reasoning and judgment behind them.
• Combination integrates separate pieces of explicit knowledge into new structures, connecting shop-floor data to industry standards or quality records to process documentation.
• Internalization is the point at which explicit knowledge, absorbed through repeated practice, becomes tacit skill again.

As an article on SECI model applications published in the International Journal of Advanced Computer Science and Applications describes it, a new hire who follows a digital instruction guide so many times and no longer needs to consult it has internalized that knowledge, and the cycle begins again.

The SECI model matters for manufacturers because it reveals where knowledge transfer typically breaks down. Most facilities do reasonably well at Socialization, the experienced worker teaches the newer one, until the experienced worker is no longer there to teach. Externalization is where the gap most often appears. The shortcuts, the machine-specific adjustments, and the pattern recognition that experienced operators apply automatically are exactly the knowledge that is hardest to articulate and most commonly lost during a retirement.

A structured approach to Externalization is not a documentation project. It is a business continuity investment. The spiral of SECI means knowledge is constantly being created and refined, and the manufacturers that understand this cycle can design systems to sustain it rather than watch it break every time a key person leaves.

Capturing knowledge is only part of the solution. Sustaining that knowledge inside the facility after it is captured requires a different kind of structure.

The next post examines Communities of Practice and how they keep knowledge active and accessible long after a formal capture effort concludes.