CanadaChris said:

Update: approved on the third attempt after a peer-to-peer.

This matches mine closely enough to be worth saying so out loud.

CanadaChris said:

Update: approved on the third attempt after a peer-to-peer.

There is a second half to this that has not been said yet. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.

Adding the numbers, since they settle part of this. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.

A narrower follow-up, since the general answer is now clear:

How long did you give it before you decided it was working?

lucas_SP_BR said:

Practical: whatever you change, write down the date and the reason.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. Pushing back on the consensus forming here. Consistency is not the same as correctness, and a board that agrees with itself quickly is usually agreeing with the first person who sounded certain.