The product mix of a company, which is generally defined as the total composite of products offered by a particular organization, consists of both product lines and individual products. A product line is a group of products within the product mix that are closely related, either because they function in a similar manner, are sold to the same customer groups, are marketed through the same types of outlets, or fall within given price ranges. A product is a distinct unit within the product line that is distinguishable by size, price, appearance, or some other attribute. For example, all the courses a university offers constitute its product mix; courses in the marketing department constitute a product line; and the basic marketing course is a product item. Product decisions at these three levels are generally of two types: those that involve width (variety) and depth (assortment) of the...