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Compute NRR, GRR and CAC payback with the working shown
- For Executives
- You practice Setting limits and rules
- Time about 5 minutes
- Level Intermediate
About this exercise
Compute three board metrics in exactly 3 lines in plain text, labeled NRR:, GRR: and CAC payback:. Show the working in each line, like "NRR: (10.0 + 1.0 - 0.5) / 10.0 = 105%". NRR and GRR use only the starting customers (exclude new-logo ARR). CAC payback is in months using gross-margin-adjusted new ARR. Round to whole numbers. No commentary.
Common mistakes when you ask AI for this
- Including new logos in NRR. The AI gets 122%. Try: Add: "NRR and GRR exclude new-logo ARR."
- Adding expansion to GRR. The AI includes the 1.2. Try: Add: "GRR has no expansion."
- Skipping gross margin. The AI computes payback from raw ARR. Try: Add: "Use gross-margin-adjusted new ARR, in months."
- Commentary. The AI adds interpretation. Try: Add: "3 lines only, no commentary."
What a strong prompt includes
- Lists the labels
- Asks for working
- Excludes new logos
- Specifies units
- No commentary
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