Hansei (jap. reflection) is one of pillars of Toyota production system. I refers to the Japanese culture, where every mistake should be acknowledged and than the person should find ways to improve. Hansei meeting after each project helps to detect new possibilities of improvement. As the improvement in Japanese philosophy has no end, also hansei is endless. To stop hansei is equal to stop learning.

The hansei is a way of life. It is taught in Japanese schools (see: references).

Hansei is one of Lean manufacturing pillars, together with: Heijunka, Poka yoke, Konnyaku stone, Andon, Just in time, Jidoka, Kaizen, Genchi genbutsu, Nemawashi.

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