structural:expansion, information:extraction
Product life cycle

The product life cycle (PLC) is a tool used by marketing managers to gauge the progress of a product, especially relating to sales or revenue accrued over time. The PLC is based on a few key assumptions, including:

In the introduction stage, a product is launched onto the market. To stimulate the growth of sales/revenue, use of advertising may be high, in order to heighten awareness of the product in question.

During the growth stage, the product's sales/revenue is increasing, which may stimulate more marketing communications to sustain sales. More entrants enter into the market, to reap the apparent high profits that the industry is producing.

When the product hits maturity, its starts to level off, and an increasing number of entrants to a market produce price falls for the product. Firms may use sales promotions to raise sales.

During decline, demand for a good begins to taper off, and the firm may opt to discontinue the manufacture of the product. This is so, if revenue for the product comes from efficiency savings in production, over actual sales of a good/service. However, if a product services a niche market, or is complementary to another product, it may continue the manufacture of the product, despite a low level of sales/revenue being accrued.