A/B Test for Email Campaign

Scenario

You work on a marketing team launching a new email campaign in Veeva CRM Approved Email and want to test whether a new creative or message variant performs better than the current version. The team wants a clean read on campaign impact, but you also need to make sure the test is measured correctly and not distorted by common experimentation issues.

Question

How would you approach an A/B testing analysis for this new email campaign? Walk through how you would define success, size the test, analyze the results, and decide whether to roll out the new variant.