Anyone who understands systems will know immediately that optimizing parts is not a good route to system excellence,” he says. He gives the example of a famous thought experiment in which an attempt is made to build the world’s greatest car by assembling the world’s greatest car parts. We connect the engine of a Ferrari, the brakes of a Porsche, the suspension of a BMW, the body of a Volvo: “What we get, of course, is nothing close to a great car; we get a pile of very expensive junk.