Testing and Acceptance: How to Manage UAT (with Checklist)

What is UAT and Why Is It Important?

A successful UAT process requires collaboration between business units and the technical team

User Acceptance Testing (UAT) is the final testing phase of the software development lifecycle. It is not about verifying whether the system works technically, but rather validating that it meets business requirements from the perspective of end users.

The Core Purpose of UAT

• Validation of Business Requirements: Were the defined requirements accurately reflected in the system?
• User Experience Testing: Is the system intuitive and usable for the staff?
• Business Process Integrity: Do end-to-end business processes function without interruption?
• Integration Verification: Does data exchange with external systems function correctly?

Why Is UAT Critical?

When UAT is skipped or performed inadequately, the following issues occur after going live:

• Users cannot operate the system, causing business processes to halt
• Requirement gaps are discovered too late, increasing costs
• User resistance emerges, leading to poor system adoption
• Management trust is shaken, and the project is perceived as a failure

Preparation Steps Before UAT

Comprehensive preparation must be completed before UAT begins

1. UAT Schedule and Resource Planning

The UAT process should be defined as a distinct phase in the project plan:

• UAT start and end dates must be clearly defined
• Test users must dedicate time for UAT outside of their daily responsibilities
• At least 10-15 hours per week should be planned for each test user
• Formal resource approval must be obtained from department managers

2. Entry Criteria

The following conditions must be met before UAT begins:

• System Integration Testing (SIT) has been successfully completed
• All critical (blocker) bugs have been resolved
• The UAT environment is ready and accessible
• Test data has been loaded and verified
• Test scenarios and acceptance criteria have been approved
• User training has been completed

3. Forming the UAT Team

The right team structure is the key to a successful UAT:

• UAT Coordinator: Manages the entire process and ensures communication
• Business Analyst: Prepares test scenarios and evaluates results
• Key Users: Representatives from each department who understand the processes
• Technical Support: A developer for environment issues and bug analysis

Test Scenarios and Acceptance Criteria

Well-written test scenarios form the foundation of UAT

Test Scenario Structure

Each test scenario should include the following components:

Scenario Identification

• Scenario ID: Unique identifier (e.g., UAT-FIN-001)
• Scenario Name: A short and clear title
• Business Process: Which business process it tests
• Priority: Critical, High, Medium, Low
• Prerequisites: What must be in place before testing begins

Test Steps

• Step-by-step actions to be performed
• Data to be entered at each step
• Expected result for each step
• Screenshots or references

Acceptance Criteria

Clear acceptance criteria must be defined for each scenario:

• Pass/Fail criteria must be clear and measurable
• Expected data results should be specified numerically
• Performance expectations (e.g., response within 3 seconds)
• Integration check (e.g., successful response from the e-invoice system)

Scenario Categories

UAT scenarios should be grouped into the following categories:

• Happy Path: Normal business flow, expected usage
• Negative Testing: Incorrect data entry, boundary values
• Edge Cases: Rare but possible situations
• End-to-End: Processes covering multiple modules
• Integration: Verification of external system integrations

Preparing the UAT Environment

The UAT environment should be as close to the production environment as possible

Environment Requirements

The UAT environment should have the following features:

Technical Infrastructure

• Same software version as the production environment
• Sufficient performance capacity (representative: 50% of production)
• Isolated network segment (separate from development/test environments)
• Daily backup and restore capability

Data Preparation

• Test data derived from anonymized real data
• Sufficient data variety (different customer types, product groups)
• Historical data (for reporting tests)
• Integration test data (bank, e-invoice, logistics)

Access Management

• Personal account for each UAT user
• Role-based authorization (same as production)
• Access logs and audit trails
• Environment usage rules and responsibilities

Environment Management Rules

• Code changes to the UAT environment are made only with approval
• The current state is backed up before every change
• A data reset schedule is defined (e.g., weekly)
• Environment access hours are defined

Bug Tracking and Defect Management

Systematic bug tracking ensures the UAT process progresses in a controlled manner

Bug Logging Process

Every bug found must be recorded with the following information:

• Bug ID: Automatically assigned unique number
• Title: Short description summarizing the issue
• Detailed Description: Step-by-step reproduction steps
• Expected Result: What should have happened
• Actual Result: What happened
• Screenshots: Visual evidence
• Environment Info: Browser, version, user

Bug Prioritization Matrix

Bugs are classified at the following levels:

Bug Lifecycle

Every bug goes through these stages:

1. New: Newly recorded
2. Assigned: Assigned to a developer
3. In Progress: Working on a solution
4. Fixed: Fix applied, ready for testing
5. Retest: UAT team is retesting
6. Closed: Verified and closed
7. Reopened: Bug persists, reopened

Regression Testing Strategy

Regression testing is mandatory after bug fixes

What is Regression Testing?

It is testing performed after a bug is fixed or a new feature is added to verify that existing functionality has not been broken.

When Should Regression Be Performed?

• After every critical/high bug fix
• After bulk code changes (patch/release)
• After database changes
• After integration updates
• Before final sign-off (full regression)

Creating a Regression Test Suite

It is not possible to test all scenarios every time. The regression set is determined based on these criteria:

• Core Business Processes: Main processes like orders, invoices, payments
• High-Risk Areas: Complex calculations, integrations
• Frequently Used Functions: Daily used features
• Recently Changed Areas: Sections affected by recent changes

Automation Recommendation

Automation should be evaluated for frequently repeated regression tests:

• Smoke test automation (basic functionality check)
• API integration test automation
• Data validation scripts
• Performance monitoring automation

Sign-Off Process and Documentation

Sign-off is the formal approval by business units that they accept the system

Exit Criteria

The following conditions must be met for UAT to be considered complete:

• All test scenarios (representative: 95%+) have been executed
• Critical and High priority bugs have been closed
• A solution plan or acceptance decision has been made for Medium bugs
• Regression testing has been completed
• Performance meets acceptance criteria
• User training has been completed

Sign-Off Levels

A multi-layered sign-off approach should be applied:

1. Module-Based Sign-Off

• Relevant department representative gives approval for each module
• Module test summary report is prepared
• Open bugs and solution plans are listed

2. Integration Sign-Off

• End-to-end business processes are verified
• External system integrations are approved
• Data consistency is checked

3. Final Sign-Off

• Project sponsor or steering committee gives approval
• Authorization for go-live is granted
• Decisions on workarounds or deferrals for unaccepted bugs are made

Sign-Off Documentation

The sign-off process includes the following documents:

• Test Summary Report: Number of scenarios executed, pass/fail rates
• Bug Summary Report: Number of open/closed bugs, priority distribution
• Risk Assessment: Accepted risks and mitigation plans
• Sign-Off Form: Signed acceptance document

UAT Checklist (30+ Items)

This checklist can be customized for your project by reaching out via the contact page.

Frequently Asked Questions (FAQ)