Three testing scenarios are presented : Random A/B, Sticky Random A/B, and External Switch A/B.

Module 1 - Display randomly either the old home page either the new home page, but no more than X% of home page impressions to be our new layout.

Module 2 - We want to display the old layout or the new one to our visitors but we want to serve the same page to a visitor that comes back to the home page. For every new visitor I want to decide randomly the home page to display but for an existing visitor to display the page he got the first time.

Module 3 - I want to be able to change the percentage between initial homepage and the new home page without any deploying.