In the AI era, you can spin up products faster than ever. But speed without direction just means you fail faster. What hasn't changed: the principles that separated groundbreaking products from the noise.
The customer outcome is the product. Grameen Bank's product isn't microloans—it's financial independence for those excluded from traditional banking (98% repayment rate). Rolls-Royce's product isn't jet engines—it's guaranteed uptime for airlines (400% increase). Yes, you have to build something excellent—a Milwaukee drill, a Swiss Army knife, a LEGO brick. But what makes it excellent is how completely it delivers the customer outcome.
These four frameworks are lenses on outcome-thinking. They're not stages or maturity levels—you'll use all of them throughout your product journey, whether you're a startup or an enterprise. They're battle-tested patterns from Victorinox, LEGO, Grameen Bank, and Rolls-Royce. Companies that transformed their industries by keeping customer outcomes central.