The Delta Model: Reinventing Your Business Strategy - Paperbackby Arnoldo C. Hax (Author) Strategy is the most central issue in management. It has to do with defining the purpose of an organization, understanding the market in which it operates and the capabilities the firm possesses, and putting together a winning plan. There are many influential frameworks to help managers undertake a systematic reflection on this issue. The most dominant approaches are Michael Porter's "Competitive Strategy" and the "Resource