BCS exists to provide companies with an outside opinion and fresh insight to help them adapt for the future, as it is difficult for companies to be unbiased when self-examining and determining their own problems and opportunities. BCS employs either an expert approach, where consultants provide their expert opinion and advice with little client input, or a facilitative approach, where consultants work more closely with the client to improve business processes. BCS can handle various specializations to meet the needs of clients in areas like strategy, operations, technology, leadership, and more.