Assuming that knowledge is created through the interaction between tacit and explicit knowledge, four different modes of knowledge conversion can be postulated: from tacit knowledge to tacit knowledge (socialization), from tacit knowledge to explicit knowledge (externalization), from explicit knowledge to explicit knowledge (combination), and from explicit knowledge to tacit knowledge (internalization).
Above mentioned four modes of knowledge conversion form a spiral of knowledge creation. Since knowledge creation can be seen as a continual process, the spiral evolves continuously through these four modes of knowledge conversion. Moreover, with the four modes of knowledge conversion, the interaction that takes place between tacit and explicit knowledge is strengthened in a spiral.
Nonaka and Konno subsequently developed the SECI model by introducing the Japanese concept of 'Ba', which roughly translates as 'place'. Ba can be thought of as a shared context or shared space in which knowledge is shared, created, and utilized. It is a concept that unifies physical space such as an office space, virtual space such as e-mail, and mental space such as shared ideas.
The model has also been much criticized at times. Criticisms include:
Laihonen, H; Hannula, M; Helander, N; Ilvonen, I; Jussila, J; Kukko, M; Kärkkäinen, H; Lönnqvist, A; Myllärniemi, J; Pekkola, S; Virtanen, P; Vuori, V; Yliniemi, T (2013). Tietojohtaminen. Tampere University of Technology. Information and knowledge management research center NOVI. ISBN 978-952-15-3058-6. 978-952-15-3058-6
Laihonen, H; Hannula, M; Helander, N; Ilvonen, I; Jussila, J; Kukko, M; Kärkkäinen, H; Lönnqvist, A; Myllärniemi, J; Pekkola, S; Virtanen, P; Vuori, V; Yliniemi, T (2013). Tietojohtaminen. Tampere University of Technology. Information and knowledge management research center NOVI. ISBN 978-952-15-3058-6. 978-952-15-3058-6
Nonaka, I. (1990). Management of Knowledge Creation. Tokyo: Nihon Keizai Shinbun-sha.
Xu, F. 2013. "The Formation and Development of Ikujiro Nonaka's Knowledge Creation Theory." Pp. 60-76 in Towards Organizational Knowledge: The Pioneering Work of Ikujiro Nonaka, edited by G. von Krogh et al. Basingstoke, UK: Palgrave Macmillan.
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Laihonen, H; Hannula, M; Helander, N; Ilvonen, I; Jussila, J; Kukko, M; Kärkkäinen, H; Lönnqvist, A; Myllärniemi, J; Pekkola, S; Virtanen, P; Vuori, V; Yliniemi, T (2013). Tietojohtaminen. Tampere University of Technology. Information and knowledge management research center NOVI. ISBN 978-952-15-3058-6. 978-952-15-3058-6
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Nonaka, Ikujiro; Takeuchi, Hirotaka (1995), The knowledge creating company: how Japanese companies create the dynamics of innovation, New York: Oxford University Press, ISBN 978-0-19-509269-1 /wiki/ISBN_(identifier)
Nonaka, I., Toyama, R., & Konno, N. (2000). SECI, Ba and leadership: a unified model of dynamic knowledge creation. Long range planning, 33(1), 5–34.
Nonaka, I., Toyama, R., & Konno, N. (2000). SECI, Ba and leadership: a unified model of dynamic knowledge creation. Long range planning, 33(1), 5–34.
Nonaka, I., Toyama, R., & Konno, N. (2000). SECI, Ba and leadership: a unified model of dynamic knowledge creation. Long range planning, 33(1), 5–34.
Nonaka, I. & Konno, N. (1998). The Concept of Ba: Building a Foundation for Knowledge Creation. California Management Review, vol. 40, is. 3, (pp.45).
Nonaka, I., Toyama, R., & Konno, N. (2000). SECI, Ba and leadership: a unified model of dynamic knowledge creation. Long range planning, 33(1), 5–34.
Gourlay, Stephen (2006). "Conceptualizing Knowledge Creation: A Critique of Nonaka's Theory" (PDF). Journal of Management Studies. 43 (7): 1415–1416, 1421. doi:10.1111/j.1467-6486.2006.00637.x. S2CID 20164658. https://eprints.kingston.ac.uk/id/eprint/339/1/Gourlay-S-339.pdf
Gourlay, Stephen (2006). "Conceptualizing Knowledge Creation: A Critique of Nonaka's Theory" (PDF). Journal of Management Studies. 43 (7): 1415–1416, 1421. doi:10.1111/j.1467-6486.2006.00637.x. S2CID 20164658. https://eprints.kingston.ac.uk/id/eprint/339/1/Gourlay-S-339.pdf
Bereiter, Carl (2002). Education and mind in the knowledge age. Taylor & Francis Group. p. 177. ISBN 0-8058-3943-7. 0-8058-3943-7