he Boston Consulting Group (BCG) is a global management consulting firm with 82 offices in 46 countries. The firm advises clients in the private, public, and not-for-profit sectors around the world, including more than two-thirds of the Fortune 500.[3] Considered one of the most prestigious management consulting firms,[4] BCG was ranked second in Fortune's "100 Best Companies
Explain what the Boston Consulting Group approach is