An experienced artisan shows an apprentice a complex manufacturing skill through direct physical demonstration, enabling the apprentice to acquire the skill via observation, practice, and imitation without formal written instructions. Under Nonaka and Takeuchi's SECI model of Knowledge Conversion, which stage does this interaction primarily represent? 

The SECI Model developed by Ikujiro Nonaka and Hirotaka Takeuchi describes four modes of knowledge conversion between tacit and explicit knowledge: Socialization (Tacit to Tacit): The process of sharing tacit knowledge through direct experience, observation, imitation, apprenticeship, and shared practice. Language or written documents are not strictly required because knowledge is passed through shared experience (e.g., a master craftsman demonstrating a technique to an apprentice). Externalization (Tacit to Explicit): Articulating tacit knowledge into explicit concepts, models, diagrams, or written manuals. Combination (Explicit to Explicit): Systematizing and combining different bodies of explicit knowledge (e.g., synthesizing reports, documents, or data into a strategic plan). Internalization (Explicit to Tacit): Embodying explicit knowledge into operational tacit knowledge through learning-by-doing or reading manuals. Since the scenario involves direct observation, imitation, and transfer of unwritten expertise from a skilled master to a trainee, it represents Socialization (Tacit to Tacit).