Category season file
Customer signals and product focus.
posts in this decision room
What did this move burn?
TAM SAM SOM is the three-layer method for sizing a market: everyone who could buy, everyone you can actually reach, and the slice you'll realistically win. Here's how to calculate each one, with a full worked example.
What did this move burn?
PMF is the point where your product meets real, repeating market demand. The definition, four measurable signals, the Sean Ellis test, and the false positives that fool founders.
What did this move burn?
Churn rate, retention curves, and NRR: the formulas, B2B SaaS benchmarks, and exactly how churn shortens your runway — with worked numbers.
What did this move burn?
Avoid false PMF signals by reading retention, repeat usage, and willingness to pay together.
What did this move burn?
The LTV:CAC ratio in plain formulas: how to calculate CAC and LTV, healthy benchmarks by stage, and why payback period matters more than the ratio.