The scoring-neutral safe space to absorb a worse-before-better dip and confirm a fix carries from the range to the course. Experiments here never count against your scores.
How the Lab closes the loop
Take your #1 fix from The Board into a scoring-neutral test: record a baseline, make one change, then re-record. The Lab charts the before/after on your real metrics and only counts it once the change survives a dwell window — so a fix has to actually transfer, not just feel good on the range. Validated wins feed back and re-rank The Board.