Create a checklist for a fair live-commerce experiment

A fair operational experiment documents the planned difference and the accidental differences that could explain the result.

A practical procedure

1. Write one hypothesis, one changed variable and the outcome definition.

2. List the product, offer, duration and delivery settings intended to remain fixed.

3. Record deviations and decide in advance which failures require a repeat or an inconclusive result.

Worked example: a fictional session

A fictional caption trial records an audio failure in one session and avoids attributing the entire audience difference to caption placement.

Check the limits

A checklist improves transparency but cannot remove every uncontrolled difference in a live audience.