Organizational flexibility is unquestionably a strategic asset in today’s dynamic business environment, and an adaptable IT infrastructure is a competitive necessity. Modern organizations must be prepared to change directions quickly to meet the needs of customers, to respond to the moves of competitors, and to take advantage of emerging opportunities. Information technology makes possible a much higher degree of flexibility than could be reached in prior years. Yet, the concept is a slippery one, very difficult to define, and there is a curious paradox: implementing an effective infrastructure requires careful planning, and planning constrains flexibility.