The Barrett Sales Strategy Model was created by Professor David Barrett in 1980, and has been used in business and marketing strategy ever since. It is a four-stage model that helps companies to identify their target market. The first step of the model is to develop a clear understanding of the target market, which can be done through market research and analysis. The second step is to define the product or service that will be offered to this target market. The third step is to create a marketing strategy that will appeal to this target market. The fourth step is to implement the marketing strategy with targeted advertising campaigns, sales promotions, and other promotional activities. The Barrett Sales Strategy Model has been widely used by businesses around the world because it provides an effective way for companies to reach out.