Exactly how the advertising funnel jobs The earliest variation of a sales channel that I have the ability to locate is this one from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Below, Dukesmith introduced the idea of four phases that cause a sale: Attention, Rate Of Interest, Wish as well as Conviction. Almost 50 years later, an advertising and also sales executive in the pharmaceutical sector, Arthur F Peterson, published the following picture in his publication, Drug Marketing, Describing, as well as Sales Educating: