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Brian Balfour's Four Fits, Applied to AI Products
Brian Balfour's Four Fits connects market-product, product-channel, channel-model, and model-market fit. This page applies those questions to AI products; it does not claim to originate the framework.
By Jake Bauman · Revised
Original framework by Brian Balfour. The AI-specific questions and examples are Jake Bauman's adaptation.
Market-product fit
Which customer has the problem, and does the product solve it in their actual workflow? Observe use and repeat use rather than relying on a demo reaction.
Product-channel fit
Can the channel carry the explanation and trust this product needs? A complex implementation may require a conversation even if the feature has a self-serve interface.
Channel-model fit
Can the acquisition channel work at the revenue and margin per customer? Include model calls, implementation, review, and support in the calculation.
Model-market fit
Can the target market sustain the pricing and scope? Revisit willingness to pay as alternatives change. Balfour's original essays explain how the four fits interact; these AI questions are prompts for your own validation.
How to use Balfour’s model
Put the four fits on one page for a specific product. Under each, write the current evidence and the riskiest assumption. For an AI product, a successful demo may support the product hypothesis while leaving channel cost and willingness to pay unanswered. Change one assumption at a time and revisit the others, because a new price or channel can alter which market the product can serve.
Sources and context
These sources inform the framework. They do not validate the suggested actions for every business.
- Brian Balfour, Four Fits for $100M+ Growth: Original source of the Four Fits framework.
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