Explicit to tacit by Internalization (knowledge receiving and application by an individual), enclosed by learning by doing; on the other hand, explicit knowledge becomes part of an individual's knowledge and will be assets for an organization. Internalization is also a process of continuous individual and collective reflection and the ability to see connections and recognize patterns and the capacity to make sense between fields, ideas, and concepts.
After Internalization the process continues at a new ‘level’, hence the metaphor of a “spiral” of knowledge creation (Nonaka & Takeuchi 1995: 71-2, 89) often referred to as the SECI model.