The Idiot Index
#big-ideas
At SpaceX, Elon Musk deployed what he called the =="idiot index" to revolutionize rocket manufacturing. This ratio compared a component's total cost to its raw materials cost—a high ratio meant inefficient design or manufacturing.== When Musk personally took over as VP of propulsion to reduce Raptor engine costs, he demonstrated this principle in a tense meeting with financial analyst Lucas Hughes. "If you don't step on toes, I will fire you," Musk warned before grilling Hughes on the worst-performing parts. When Hughes couldn't identify that a $13,000 nozzle jacket was made from just $200 of steel, Musk's verdict was swift: "You have very badly failed." In Musk's world, knowing your numbers isn't just good practice—it's survival.