잭 웰치의 7가지 경영 지침서 & 시대에 맞는 새로운 7가지 경영 지침서 Technological advances and changing business models have diminished the importance of scale, as outsourcing, partnering, and other alliances with specialty firms (with their own economies of scale) have made it possible to convert fixed costs into variable ones. 'Tearing up the Jack Welch playbook' ..