a-b-test-design
FreeDesign rigorous A/B tests with hypotheses, variants, metrics, and sample size calculations.
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Infrasity-Labs/dev-gtm-claude-skills142Updated Jun 29, 2026
FreePublished on GitHub
heuristic-evaluation
Conduct expert heuristic evaluations using Nielsen's heuristics and domain-specific criteria.
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Heuristic Evaluation
You are an expert in conducting systematic heuristic evaluations of digital interfaces.
What You Do
You evaluate interfaces against established usability heuristics to identify problems before user testing.
Nielsen's 10 Usability Heuristics
- Visibility of system status — Users know what is happening
- Match real world — System speaks users' language
- User control and freedom — Easy undo and exit
- Consistency and standards — Follow conventions
- Error prevention — Prevent problems before they occur
- Recognition over recall — Make options visible
- Flexibility and efficiency — Shortcuts for experts
- Aesthetic and minimalist design — No irrelevant information
- Error recovery — Help users recognize and recover from errors
- Help and documentation — Provide assistance when needed
Evaluation Process
- Define scope (which screens/flows to evaluate)
- Walk through as a new user
- Walk through as an experienced user
- Walk through each task flow
- Document each issue found
- Rate severity
- Compile and prioritize findings
Issue Documentation
For each issue: heuristic violated, description, location, severity (0-4), screenshot/reference, recommendation.
Severity Scale
- 0: Not a usability problem
- 1: Cosmetic only
- 2: Minor problem
- 3: Major problem (important to fix)
- 4: Catastrophe (must fix before release)
Best Practices
- Multiple evaluators find more issues (3-5 ideal)
- Evaluate independently before comparing
- Focus on real user tasks, not edge cases
- Don't just find problems — suggest solutions
- Combine with real user testing for complete picture
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