How and What to Test Effectively

The previously discussed pros and cons still apply here. It’s imperative to select the test panels after the merge/purge process to maintain statistical accuracy.

For example, say you want to test a free-shipping offer against an offer for $10 off an order of $99 or more. This test will require not two but three separate test panels. Let’s also assume you want to test these offers against your entire housefile of 120,000 buyers.