Why James Dyson kept building prototypes long after most people would quit? This reveals his billionaire invention rule

James Dyson's journey to invent the bagless vacuum cleaner involved 5,127 prototypes, highlighting the power of iterative design and learning from failure. This extensive process demonstrates that innovation stems from persistent testing, correction, and refinement rather than sudden inspiration. The story emphasizes that embracing failure as valuable data is crucial for product development and success.