What is UAT?

Overview

UAT (User Acceptance Testing) is the final stage of testing before a software product is released to production. Actual end-users or the client validates that the software meets their needs and business requirements.

Definition

UAT confirms that:

• The system does what the business needs it to do
• The software meets the acceptance criteria defined in requirements
• Real users can use the system without issues

UAT Phases

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1. UAT Planning    → Define scope, test scenarios, entry/exit criteria
2. UAT Design      → Write detailed test cases based on user stories
3. UAT Execution   → Users test in staging environment
4. Defect Logging  → Report bugs/issues found
5. Retesting       → Verify fixes
6. Sign-off        → Stakeholders approve release

UAT vs System Testing

UAT for Flutter Apps — Practical Example

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Story: "As a user, I can place an order and receive an order confirmation"

UAT Steps:
1. Open app → Log in ✅
2. Browse products → Add to cart ✅
3. Apply promo code "SAVE10" → Discount applied ✅
4. Checkout → Enter address + payment ✅
5. Place order → Confirmation email received ✅
6. Check order history → New order visible ✅

Result: PASS → Ready for production

Distributing for UAT

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# Firebase App Distribution — ideal for UAT
firebase appdistribution:distribute app-release.apk \
  --app YOUR_FIREBASE_APP_ID \
  --groups "uat-testers" \
  --release-notes "Sprint 5 UAT Build — test checkout flow"

UAT Sign-off Checklist

• All critical user flows tested
• Business rules validated
• Edge cases tested (no internet, slow connection)
• Performance acceptable to users
• Accessibility verified
• Stakeholder approval obtained

UAT is not about finding technical bugs — it's about confirming the software delivers real business value. A passing UAT is the final green light before production release.