TestedFreePlanning
Check whether the change actually moved anything.
Get a straight diff on whether your change moved anything, or nothing.
2 viewsWorks withChatGPTClaudeGeminiDeepSeekPerplexityCopilotAny model
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Example result
The straight diff
The change: You switched your newsletter send from Tuesday 9am to Thursday 7am, starting three weeks ago.
Before: ~38% open rate, ~2.1% click rate, roughly 4 new subscribers per issue.
Since: ~41% open rate, ~2.0% click rate…
01
What this prompt does
- Diffs before against after
- Separates your change from the context
- Allows a too-early-to-tell verdict
- Ends with one next step
02
How to use the prompt
- 1Say what you changed and when
- 2Paste your before and after numbers
- 3Name anything unusual in that period
- 4Run the prompt
- 5Act on the closing sentence
Tags#review#measurement#bottleneck
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