How to set a useful stop rule for a marketing experiment
https://brandlyup.com/insights/how-to-set-a-useful-stop-rule-for-a-marketing-experiment/

QUICK ANSWER
A stop rule states what evidence or operational condition will cause an experiment to pause, continue or change. Agree it before results arrive. Include data quality and customer experience failures as well as budget limits so a broken journey does not keep receiving traffic.

WORKING CHECKLIST
1. Write continue, pause and change conditions.
2. Include journey failures and capacity limits.
3. Record the observation scope.
4. Review uncertainty before extending spend.

YOUR BRIEF
Business / website:
What needs to change:
Existing materials:
Open questions:
Timing:

SCOPE
AI-assisted practical guide. Examples are illustrative; business-specific facts and sector claims need the responsible owner’s approval.

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