Can you explain the concept of 4 Amigos in the software development process?

The "4 Amigos" concept in software development is a practice of collaboration among four key roles to improve quality and understanding of requirements:

1. Developer — writes code and implements functionality.
2. Tester/QA — checks quality and correctness.
3. Business Analyst — responsible for understanding and formalizing requirements.
4. Product Owner/Customer — provides product vision and priorities.

These four participants collaboratively discuss requirements, use cases, and acceptance criteria, which helps identify issues early and improve communication between teams.