Growth Engineering Playbook · Wave 5
The LTV in your deck is probably revenue in disguise.
"LTV:CAC of 8" only means something if the LTV is contribution margin — revenue minus discounts, returns, and cost of goods — not gross revenue, which flatters every channel. This computes realised per-customer contribution from the real Northstar Outfitters order data, groups customers by how they were acquired, and puts it next to a documented CAC table to get the LTV:CAC ratio and payback period — flagging the channels that look fine on revenue but are marginal on profit. Toggle revenue vs contribution to see the gap. Deterministic, client-side.
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LTV:CAC by acquisition channel
The line is the 3:1 rule of thumb. Green clears it; amber is marginal; red loses money on every acquisition.
Payback
How long one segment takes to earn back its CAC.
Unit economics by segment
Realised contribution to date — not a projection. Small segments are labelled with their customer count so you can see where the numbers are thin.