User Acceptance Testing (UAT) is the stage where the people who will actually use the software confirm that it meets their real business needs. It is the last major gate before go-live, and it answers a question no amount of technical testing can: "does this actually work for us?"
What makes UAT different
- Performed by business users, not just the technical team.
- Focused on real-world scenarios and workflows, not code.
- Validation, not verification — it checks the right product was built.
- Based on agreed acceptance criteria tied to business requirements.
Where UAT sits
System testing technical
→
UAT business users
→
Go-live decision
Success factor: UAT works best with clear acceptance criteria agreed up front, realistic data, and well-prepared users who know what to test and why.
Conclusion
UAT is the business's own verdict on whether the software is fit for purpose. By putting real users in front of real scenarios against agreed criteria, it provides the confidence — and the sign-off — needed to go live.