Stop Calling A/B Tests Early — Get Alerted Only at Significance
Peeking at A/B tests and calling winners early is how teams ship losers. Monitor your tests and get alerted only when a result is actually statistically significant.
- 1
Track the Test
Add a
Schedule Triggerdaily pulling each variant's visitors and conversions. - 2
Run the Math
Add a
Codenode computing significance and required sample size. - 3
Stay Silent Until Sure
Add an
IFnode alerting only at your confidence threshold (e.g. 95%). - 4
Deliver the Verdict
Add a
Slacknode:Variant B wins: +18% conversion, p<0.05, n=4,213. Safe to ship. - 5
Activate and Test
Activate the workflow on a live test. Confirm it stays quiet until significance.
Frequently asked questions
Why is peeking so bad?
Checking daily and stopping at the first 'significant' peek inflates false positives massively — the discipline is the value.
What if the test never reaches significance?
Alert when the projected sample date is too far out — an honest 'this test is underpowered' verdict.
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