In 2010, Dave Brailsford faced a tough job. No British cyclist had ever won the Tour de France, but as the new General Manager and Performance Director for Team Sky (Great Britain’s professional cycling team), Brailsford was asked to change that. His approach was simple. Brailsford believed in a concept that he referred to as the “aggregation of marginal gains.” He explained it as “the 1 percent margin for improvement