The biggest change Musk wrought was to put the design engineers in charge of production, like he had done for a while at Tesla. “I created separate design and production groups a long time ago, and that was a bullshit mistake,” he said at one of the first meetings that McKenzie led. “You are responsible for the production process. You can’t hand it off to someone else. If the design is expensive to produce, you change the design.” McKenzie and his engineering team moved their seventy-five desks to be next to the assembly lines.
