2 resources from Growth Unhinged we point founders to, and the questions each answers.
✍️ Essay
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Kyle Poyar writes for people running go to market at growth stage B2B companies, so this piece is useful once your ICP needs to hold up across sales, marketing, and product, not just your own instinct. He is specific about the difference between saying you are focused on an ICP and being able to show the data behind it. A good gut check for founders who think they have an ICP but could not produce this chart if asked.
Poyar's framing that you need a rough early customer profile before you can earn a real ICP is a useful corrective for founders who try to write the perfect document too soon. It walks through how the profile should sharpen as you get more data, which is the same quarterly revisit discipline your short answer calls for. Grounded in patterns across many B2B SaaS companies he has advised.