From the other side of the consultation, briefly. Start from the measurement rather than the conclusion. Almost every disagreement here turns out to be two people measuring different things and comparing the numbers anyway.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
VendorMark said:Start from the measurement rather than the conclusion.
This matches mine closely enough to be worth saying so out loud. Nothing to add that would improve it.
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Shop Reference StandardsOne concrete data point for the thread. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.
A narrower follow-up, since the general answer is now clear:
What would you measure differently if you were starting again?