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04 · Hansei
To learn is not to repeat.
Honest reflection
Acknowledge in order to learn.
The concept
Hansei is the practice of honestly acknowledging what didn’t work — not to blame, but to learn. Even in success, one asks what could have been better.
In engineering
Every incident becomes learning. We run post-mortems with no witch hunt: what failed, why, and what changes so it doesn’t repeat. An error recorded and understood is an error that doesn’t return.