# Decision Tree - Iris Classification
📝 **This chapter is under construction.**
This case study demonstrates decision tree classification on the Iris dataset,
following EXTREME TDD principles.
**Topics covered:**
- GINI impurity splitting criterion
- Recursive tree building
- Max depth configuration
- Multi-class classification
**See also:**
- [What is EXTREME TDD?](../methodology/what-is-extreme-tdd.md)
- [Complexity Analysis](../quality-gates/complexity-analysis.md)