Product Life Cycle

The Product Life Cycle (PLC) describes the four stages a product passes through from its introduction to the market until it is eventually withdrawn: Introduction, Growth, Maturity, and Decline. The PLC is a strategic tool — different stages call for different pricing, promotion, and distribution decisions.

graph LR
    I[1. Introduction\nHigh cost · Low sales\nNo competition yet] --> G[2. Growth\nRising sales\nCompetitors entering]
    G --> M[3. Maturity\nPeak sales\nHeavy competition\nPrice pressure]
    M --> D[4. Decline\nFalling sales\nProduct phased out]

    I -.->|Pricing Strategy| SK[Price Skimming\nor Penetration\nDepends on competition]
    G -.->|Pricing Strategy| ADJ[Adjust pricing as\nrivals enter market]
    M -.->|Pricing Strategy| COMP[Competitive pricing\nAt or below market]
    D -.->|Pricing Strategy| CUT[Price cuts\nor discontinuation]

How It Appears Per Course

ADMN 201

The Product Life Cycle is introduced in Ch13 as a framework that connects to pricing strategy decisions. The source notes the four stages with a textbook diagram, but detailed stage descriptions are not fully elaborated in the lesson notes — see Open Questions below for what warrants further review.

The Four Stages

1. Introduction

A new product enters the market. Key characteristics:

• Low sales volume (consumers are not yet aware)
• High costs (development + early marketing investment)
• Limited or no competition

Pricing connection: if there is genuinely no competition, Price Skimming is appropriate — recover development costs quickly before rivals arrive. If competition already exists or is expected immediately, Penetration Pricing is more effective.

2. Growth

Sales begin to rise significantly. Key characteristics:

• Growing consumer awareness
• New competitors are attracted by the market opportunity (the “Free Money” problem from skimming)
• The firm must decide whether to maintain its price or adjust as rivals enter

Pricing connection: a firm that used Price Skimming in Introduction will likely need to lower prices in Growth as competitors arrive with alternatives.

3. Maturity

Sales reach their peak and then plateau. Key characteristics:

• Market is saturated — most potential buyers already own or know about the product
• Heavy competition from many rivals
• Strong price pressure — competitors undercut to win remaining buyers

Pricing connection: at-market or below-market pricing becomes more common. Differentiation through brand loyalty, service, or product updates is needed to maintain sales without further price cuts.

4. Decline

Sales fall. Key characteristics:

• Market may be shrinking (technological change, shifting consumer preferences)
• Firms must decide whether to cut prices to clear stock, reposition the product, or discontinue

Pricing connection: price cuts or product discontinuation. Some firms find niche loyal customers who sustain a smaller but profitable market.

PLC and the Marketing Mix

The PLC does not just affect pricing — all four Ps typically shift at each stage:

Stage	Product	Price	Place	Promotion
Introduction	New, limited features	High (skim) or Low (penetrate)	Limited outlets	Heavy awareness advertising
Growth	Product improvements	Adjusting as competition grows	Expanding distribution	Build brand preference
Maturity	Differentiation + line extensions	Competitive / discounting	Intensive distribution	Maintain loyalty, defend share
Decline	Simplify or phase out	Price cut	Selective outlets	Minimal

Cross-Course Connections

PricingStrategies — Price Skimming and Penetration Pricing are directly tied to the Introduction stage
MarketingMix — the full 4 Ps shift at each life cycle stage
DegreesOfCompetition — competition level changes through the PLC, affecting strategy
ProductDevelopment — new product development feeds into the Introduction stage

Key Points for Exam/Study

• 4 stages: Introduction → Growth → Maturity → Decline
• Introduction: low sales, high cost, little competition → Skimming or Penetration pricing
• Growth: rising sales, competitors entering → adjust pricing downward
• Maturity: peak sales, heavy competition, price pressure
• Decline: falling sales → price cuts or discontinuation
• PLC affects all 4 Ps, not just pricing
• Price Skimming works in Introduction only if competition is low or nonexistent

Open Questions

• What does the textbook diagram show for each stage in terms of sales and profit curves?
• How do firms extend the Maturity stage (e.g., product refreshes, new markets)?
• Is the PLC a predictive model or a descriptive one — can firms control which stage they are in?