A manager is hoping to reach a certain target for camera sales in his store, which sells between 10 and 20 cameras a week  Typically, most cameras sold in any week are the less expensive economy models, and his store has sold relatively fewer of the more expensive, high-end cameras  The manager realizes that if, on average, three more cameras sold each week were high-end instead of economy models, the store would reach its target in sales
The manager prepares a detailed information sheet for the sales associates, outlining the numerous advantages of the high-end cameras over the economy cameras, and provides each sales associate with a portfolio of contrasting photos of the same images, showing the clearly superior image quality of the high-end cameras
The sales associates are already well informed about the capabilities of all the cameras, and often know detailed technical information about their circuitry.