Lean tools fall into different levels of complexity, represented by martial arts-style belt colors. First of all, the Yellow Belt represents the least complex level. Next, the Green Belt reflects an intermediate level. Finally, the Black Belt is the most advanced. The list below outlines all Lean Yellow Belt tools. Individuals trained at this level can apply them independently, in accordance with the IASSC Body of Knowledge. Moreover, the IASSC refers to the Yellow Belt level as “Lean Practitioner“.
Lean Yellow Belt tools
- 5S
- Andon
- Gemba (The Real Place)
- Kaizen (Continuous Improvement)
- SMART Goals
- Standardized Work
- Visual Management (also known as Visual Controls, Visual Factory, Visual Thinking or Visual Workplace)
In general, certified Lean Yellow Belts are valuable team members in improvement projects. In comparison, Lean Green Belts typically lead smaller initiatives. Meanwhile, Lean Black Belts manage larger, more complex projects. In addition, higher belt levels often coach professionals at lower levels in their continuous improvement efforts.
In order to implement Lean successfully, organizations should create a hierarchy of Lean Belts. For example, top-level managers might serve as Lean Black Belts. Similarly, middle managers could become Green Belts, and lower-level managers may be trained as Yellow Belts. As a result, this structure enables coaching, centralizes advanced knowledge, and reinforces managerial support.
Apart from the Lean Yellow Belt tools listed above, more advanced tools are available at higher complexity levels:
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About the Author
Floris Lap is an IASSC-certified Lean Six Sigma Black Belt and founder of Procestimal. He empowers organizations to maximize value and reduce waste through practical Lean Six Sigma solutions—contributing to a more sustainable world where businesses thrive with minimal resources. Contact us