CROis the most misunderstood growth discipline. Teams run A/B tests without hypotheses, declare winners without statistical significance, call it CRO. Real CROis a system.
The PIE prioritization framework
Potential (how much can CVR improve?), Importance (how much traffic?), Ease (how hard to implement?). Score each hypothesis 1-10. Prioritize highest scores. Most teams run low-PIE tests because they are easy.
Hypothesis structure
Every test needs: Because [observation from data], we believe [change] will result in [metric improvement]. If you cannot write this structure, you do not have a hypothesis, you have an opinion.
Sample size math
Use a sample size calculatorbefore launching. Running a test with too little traffic means declaring a winner that is not one. Most teams running 2-3 tests per month at 5K visitors per variant are running noise.
Testing cadence that works
- →Weekly: hypothesis review + backlog prioritization.
- →Bi-weekly: new test launched (1-2 per sprint, not 10).
- →Monthly: completed tests analyzed with A/B test calculator.
- →Quarterly: themes + learnings documented.
Apply this: free cro tools.
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