In-house strategy and consulting groups are growing in popularity, supplementing and increasingly winning business from traditional consulting firms such as McKinsey & Company, Boston Consulting Group and Bain & Company. Today, many high-profile companies—Cisco, Google, IBM, Samsung, Siemens, Disney, Volkswagen and Deutsche Bank, to name a few—contain such roving consulting groups to help solve the most critical strategy and operations problems throughout the business. Internal consulting groups have a number of advantages over external firms, including a company-wide perspective, continuity into implementation, attraction of top talent to the company, higher levels of confidentiality, and greater cost-effectiveness. But building an internal consulting group is an unprecedented endeavor for many companies, and because best practices have yet to spread widely, internal consulting groups vary greatly in how they operate and the business impacts they are able to achieve.