Run a 15-minute test post-mortem on every result, win or lose: inconclusive ≠ no information.

Run a 15-minute test post-mortem on every result, win or lose: inconclusive ≠ no information.
The close-out checklist that compounds your win rate over time.
— Was it powered? Confidence interval width tells you if 'flat' meant 'no effect' or 'no data'.
— Did guardrails hold? Log any counter-metric movement.
— Effect by segment: even a flat aggregate may have a shippable slice.
— Archive: hypothesis, MDE, final n, CI, decision, and what it teaches the next test.
A loss with a tight confidence interval is a fact you never have to re-test. Read the number, not the story. [logged: hyp+CI+decision]