Usability testing is a UX research method that identifies problems early by testing digital products with real users. According to Jakob Nielsen’s research, testing with just 5 users reveals 85% of issues. This makes it one of the most efficient UX research methods available.
Types of Usability Testing
Moderated vs Unmoderated
| Feature | Moderated | Unmoderated |
|---|---|---|
| Setting | In-person / Remote | Remote (platform) |
| Participant Count | 5-10 | 20-100+ |
| Depth | Very High | Medium |
| Cost | High | Low-Medium |
| Follow-up Questions | Can be asked in real time | Predefined only |
Testing Process: Step by Step
- Define objectives: What are you testing? (navigation, checkout, onboarding)
- Recruit participants: 5-10 people matching the target user profile
- Prepare scenarios: Define realistic tasks
- Pilot test: Validate scenarios with 1-2 people
- Test sessions: Conduct with the think-aloud protocol
- Analysis: Classify issues by severity and frequency
- Reporting: Present findings with actionable recommendations
Usability Metrics
- Task completion rate: Percentage of users who successfully complete a task
- Task time: Time to complete a task (seconds)
- Error rate: Number of errors made during a task
- SUS (System Usability Scale): 10-question standard questionnaire (target: 68+)
- NPS (Net Promoter Score): Likelihood of recommendation
- CSAT (Customer Satisfaction): Satisfaction score
Severity Classification
Use a severity scale to prioritize identified issues:
- Critical (P0): Task cannot be completed — fix immediately
- Major (P1): Task completed with significant difficulty — next sprint
- Minor (P2): Minor inconvenience — add to improvement plan
- Cosmetic (P3): Aesthetic issue — fix when opportunity arises
💡 Continuous Testing Culture: In TAGUM‘s product development process, usability tests are an integral part of every sprint cycle. Our PratikEsnaf.Net and HemenBasla.Net platforms are continuously improved through regular user testing.
Remote Usability Testing Tools
- UserTesting: Comprehensive platform with a large participant pool
- Maze: Figma-integrated rapid testing
- Lookback: Ideal for moderated remote testing
- Hotjar: Session recordings and heatmaps
- Microsoft Clarity: Free session recording and analytics
5 users
Sufficient to uncover 85% of usability issues
Source: Jakob Nielsen, Nielsen Norman Group
Sufficient to uncover 85% of usability issues
Source: Jakob Nielsen, Nielsen Norman Group
Conclusion
Usability testing is the research method that delivers the highest ROI in digital product development. Testing early and often reduces development costs and increases user satisfaction. Test with real users before launching your product — even at the prototype stage. The TAGUM UX team provides comprehensive support from usability test planning to reporting.
