Once the theme test is underway, adjustments to the time interval is not possible.
For optimal results in theme or product testing, it is recommended that the time increment for changes be extended beyond the 30-minute mark. We propose intervals of a few hours, such as 3-4 hours or even longer.
Consider this scenario: If a visitor is currently in your store and viewing Theme A, and the schedule dictates a switch to Theme B, the visitor will continue to experience Theme A until they refresh their page. A page refresh will then display Theme B, as it is the active theme in the database. This extends to instances where a user adds an item to their cart; the event will be attributed to Theme B due to its status in the database. Given these factors, it's advisable to opt for larger time increments than the 30-minute duration.