I have always thought Hansei or Reflection was a key part of Lean thinking. I talk about it as part of introducing CAP-Do in the video below.
If you have not purchased CAP- Do, it is available for download as a PDF.
P.S. Peter Senge calls this process Presencing and this short 60-minute audio, Working with Presence: A Leading with Emotional Intelligence Conversation with Peter Senge, should be in everyone’s library.