Steps 1 and 2 of the guidelines: https://meta.wikimedia.org/wiki/Discovery/Testing#Guidelineshttps://meta.wikimedia.org/wiki/Discovery/Testing#Guidelines
Documentation:
- Sampling rate
- Population it hits (e.g. "everyone who gets zero results")
- Any additional information included in the log files to assist in the analysis
This is added to the bottom of the Discovery Testing page: https://meta.wikimedia.org/wiki/Discovery/Testing