d. Product line depth is the number of product items in a product line. Firms
increase the depth of their product lines to:
• Attract buyers with different preferences
• Even out seasonal sales patterns
e. Adjustments to Product Items, Lines, and Mixes: Over time, firms change
product items, lines, and mixes to take advantage of new technical or product
developments or to respond to changes in the environment. They may do so by
modifying or repositioning products, or extending or contracting product lines.
f. Product Modification: Product modification involves changing one or more of a
product’s characteristics.
• Quality modification – a change in a product’s dependability or durability to
g. Planned obsolescence is the practice of modifying products so those that have
already been sold become obsolete before they actually need replacement.
(Example: cell phones)
h. Repositioning: Marketers use repositioning to change consumers’ perceptions of
a brand. They are motivated to do so because of changing demographics,
declining sales, changes in the social environment, and competition.
Example: Weight Watchers has rebranded itself as WW and overhauled its
i. Product Line Extensions: A product line extension involves adding additional
products to an existing product line in order to compete more broadly in the
industry. Product lines can be overextended when: