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How the triangle’s three points and center fit together
The shorthand in Taylor Soper’s April 24, 2025 GeekWire account puts three questions around the triangle—why the problem exists, why now, and why this solution—with founder-market fit in the middle. In his March 25, 2022 Madrona article, McIlwain lays out four explicit “why” questions, including “Why Us?”
These are complementary descriptions, not competing models: “Why Us?” names the team-fit issue represented by the center. McIlwain wrote, “There are four core elements to Founder-Market Fit, and each element is grounded in a ‘why’ question.” The framework is a way to examine an opportunity and the team pursuing it—not a prediction that a startup will succeed.
Why does this problem exist?
Start with the customer’s underlying problem: who experiences it, what makes it costly or frustrating, and why it remains unresolved. A technology trend or product category is not, by itself, an explanation of a customer need. McIlwain cautions against opening with a technology label before establishing the problem.
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This question also tests the founders’ connection to the problem. Why do they care about solving it, and what have they learned about the people affected by it? A strong pitch makes the need understandable before asking an audience to believe in a particular technology or product.
Why now?
A startup needs a reason the opportunity is timely, not merely a claim that the problem exists. Identify what has changed—perhaps technology, social behavior, customer expectations or business models—and explain how that change makes a solution newly viable or valuable.
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McIlwain’s examples in the Madrona article include cloud computing and social networks: shifts in the environment can make an approach workable at one moment even if an earlier attempt came too soon. The useful test is to connect the change to customer behavior or the ability to deliver the solution, rather than treating “now” as a slogan.
Why this?
Explain why the proposed solution can address the problem compellingly under today’s conditions. That means more than describing features: founders need a case for why customers would switch, adopt, or take a chance on it.
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McIlwain notes that customer anxiety, inertia and risk aversion can make change difficult. Founders should therefore use customer and market signals to refine the product rather than assume the first specification is right. The question is whether the solution is persuasive enough to overcome the practical reasons customers may stay with what they already do.
Why Us?
At the center is whether this team is suited to pursue this particular opportunity. Consider its motivation, relevant experience and skills, understanding of customers, and ability to adapt. Founder-market fit does not mean founders must have spent years in the exact market or already know the full route to success.
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It does mean they must keep testing their assumptions, learn from what happens, and recognize capabilities the venture still needs. Building, selling and supporting an offering may require skills or team members the founders do not yet have. The question is not whether the team is complete on day one, but whether it can learn and assemble what the opportunity demands.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use the questions as a learning loop, not a one-time pitch test
McIlwain’s formulation is most useful when the four questions are revisited as evidence changes. Customer conversations and market data can challenge assumptions about the problem, the timing, or the best product form. The team can then update its solution and identify missing skills instead of defending an early idea simply because it appeared in the original pitch.
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GeekWire reports McIlwain describing founder-market fit as “an attitude of a continuous learning loop.” That attitude matters because a startup can understand an opportunity in broad terms and still get a specific early product choice wrong.
What the Uber example does—and does not—show
As reported by GeekWire, McIlwain used Uber to illustrate that distinction: its first product was a black-car service, while the later large business involved people using their own vehicles to drive others. He described the early direction as “directionally correct and specifically wrong on this point of the triangle.” The example illustrates the possibility of changing product form as a company learns; it does not show that the framework can predict which startups will succeed.
Quick Recap
A practical way to apply the framework to a pitch
- State the customer problem. Describe who has it, why it persists and why the team is committed to addressing it.
- Name the change that makes this timely. Link a shift in technology, behavior, expectations or business models to a newly workable or valuable response.
- Make the case for the solution. Explain how it addresses the need and why customers might overcome the risks and inertia of changing.
- Examine team fit. Assess the team’s insight, motivation and capabilities, then identify what it must learn or add.
- Revisit all four answers. Use customer and market evidence to adjust the product and the team’s plan as the venture develops.
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