What is lean startup methodology and when should I use it?

Lean startup methodology emphasizes building, measuring, and learning quickly to validate business ideas with minimal resources. Key concepts include building MVPs (Minimum Viable Products), testing hypotheses with real customers, pivoting based on learning, and focusing on validated learning over assumptions. Use it when starting new products or features, when entering new markets, or when you're unsure about customer needs. It's about learning what customers want quickly and cheaply. Many consultants help companies apply lean startup principles. Lean methodology helps avoid building features nobody wants. It's especially valuable for startups and new product development.