Exactly how the advertising channel jobs The earliest variation of a sales funnel that I have the ability to discover is this from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Below, Dukesmith introduced the principle of 4 stages that lead to a sale: Focus, Interest, Need as well as Sentence. Nearly half a century later on, an advertising and marketing and also sales exec in the pharmaceutical market, Arthur F Peterson, released the complying with illustration in his book, Drug Marketing, Detailing, and also Sales Training: