Category season file
Customer signals and product focus.
posts in this decision room
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An MVP (minimum viable product) is the smallest version of a product that tests a real customer problem before you build the rest. The definition, four common MVP types, real examples, and how to avoid the most common building mistakes.
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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.
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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.
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Churn rate, retention curves, and NRR: the formulas, B2B SaaS benchmarks, and exactly how churn shortens your runway — with worked numbers.
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Avoid false PMF signals by reading retention, repeat usage, and willingness to pay together.
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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.