The Toyota approach to lean is quite sophisticated and is based on a model called the Lean Thinking House (Larman & Vodde, 2009). The Toyota model includes two pillars:

• Respect for People
• Continuous Improvement

These pillars struck a cord with me.  I’m normally more interested in what practices work than in values and principles however these two phrases seemed to nicely summarise my approach to work and are key themes in my career.

References

Larman, C., and Vodde, B. (2009). Scaling Lean & Agile Development: Thinking and Organizational Tools for Large-Scale Scrum. Addison-Wesley.