I was recently working with a retail client and was discussing their merchandise strategy with their display manager. I asked the person about two products on the same display and who would buy them. The display manager mentioned that one of the products would, in their view, be purchased by 65 year-old woman, whilst the product next to it would be purchased by a 25 year-old woman. Was the display working? I’m afraid not. Why wasn't it working? Because the person building the display did not .