Product Life Cycle: Marketing Study Notes
October 11, 2026
π Product Life-Cycle Management (Marketing)
- What product life-cycle management (PLM) is and where the concept comes from
- The goals of PLM
- The product life cycle (PLC) and its three assumptions
- Managing the offering and the pressure to sell a product within its life
- Strategies for extending the product life cycle
- The stages used to characterise the PLC, including Harold W. Fox's five-stage model
- Utilising the product life cycle: Levitt's three operating questions
- The difficulty of identifying a product's stage, and the role of user-generated content
π‘ What Is Product Life-Cycle Management?
Product life-cycle management (PLM) is the succession of strategies by business management as a product goes through its life-cycle.
- The conditions in which a product is sold (for example advertising and saturation) change over time.
- These conditions must be managed as the product moves through its succession of stages.
Origin of the concept
- The economist Theodore Levitt referred to the concept in a 1965 Harvard Business Review article.
- He observed that "most alert and thoughtful senior marketing executives", and even "a handful of uniquely cosmopolitan and up-to-date corporate presidents", were by then "familiar with the concept of the product life cycle".
- However, he felt they still needed to move forward in using it commercially.
π― Goals of PLM
The goals of product life cycle management are to:
- Reduce time to market
- Improve product quality
- Reduce prototyping costs
- Identify potential sales opportunities and revenue contributions
- Maintain and sustain operational serviceability
- Reduce environmental impacts at end-of-life
Supporting points
- To create successful new products, the company must understand its customers, markets and competitors.
- PLM integrates people, data, processes and business systems.
- It provides product information for companies and their extended supply chain enterprise.
- PLM solutions help organizations overcome the increased complexity and engineering challenges of developing new products for the global competitive markets.
π The Product Life Cycle (PLC)
The concept of product life cycle (PLC) concerns the life of a product in the market with respect to business/commercial costs and sales measures.
- The product life cycle proceeds through several phases.
- It involves many professional disciplines.
- It requires many skills, tools and processes.
Three assumptions of PLC management
- Products have a limited life, and thus every product has a life cycle.
- Product sales pass through distinct stages, each posing different challenges, opportunities, and problems to the seller.
- Products require different marketing, financing, manufacturing, purchasing, and human resource strategies in each life cycle stage.
Managing the offering
- Once the product is designed and put into the market, the offering should be managed efficiently so that buyers get value from it.
- Before entering any market, the industry carries out a complete analysis of both external and internal factors, including:
- laws and regulations
- environment
- economics
- cultural values
- market needs
- From the business perspective, as a good business, the product needs to be sold before it finishes its life.
- In terms of profitability, expiry may jolt the overall profitability of the business. Therefore, a few strategies are practiced to ensure that the product is sold within the defined period of maturity.
π Extending the Product Life Cycle
Extending the product life cycle by improving sales can be done through the following approaches.
| Approach | Description |
|---|---|
| Advertising | Its purpose is to get additional audience and potential customers. |
| Exploring and expanding to new markets | By conducting market research and offering the product (or some adapted form of it) to new markets, it is possible to get more customers. |
| Price reduction | Many customers are attracted by price cuts and discount tags. |
| Adding new features | Adding value to the product to enhance its usability or to attract the attention of a wider customer base. |
| Packaging | New, attractive, useful or eco-friendly packaging influences the target customers. |
| Changing customer consumption habits | Promoting new trends of consumption can increase the number of customers. |
| Special promotions | Raising interest by offering Jackpot and other offers. |
| Heightening interest | Many things attract customers who match certain profiles (see below). |
Examples of "heightening interest"
- Eco-friendly production processes
- Good work conditions
- Funding the efforts of non-profit organizations (cancer cure, anti-war efforts, refugees, GLTBI, environment and animal protection, etc.)
Something important to notice is that all these techniques rely on advertising to become known. Advertising needs the others to target other potential customers and not the same over and over again.
π§ Characteristics of PLC Stages
- Four of five stages are typically used to characterise the product life cycle.
- Harold W. Fox referred to a five-stage "sales model" in 1975.
Fox's five stages
- Precommercialization (also referred to as "development")
- Market introduction
- Growth
- Maturity
- Decline
The four-stage model
The four-stage model consists of introduction, growth, maturity and decline.
| Stage | Sales | Profit | Competition | Marketing focus |
|---|---|---|---|---|
| Introduction | Low, building slowly | Negative or very low, because of launch costs | Little or none | Build awareness and encourage trial |
| Growth | Rising rapidly | Increasing | Growing as new rivals enter | Build brand preference and widen distribution |
| Maturity | Peak, then levelling off | Highest, then under pressure | Intense | Defend market share and differentiate |
| Decline | Falling | Falling | Shrinking as firms exit | Cut costs, harvest, or phase the product out |
π οΈ Utilising the Product Life Cycle
- Whilst Levitt noted that the concept of the product life cycle was well-known, he argued that it was being underused.
- He believed it had greater potential to support business strategies than had been considered at that time.
Levitt's three "operating questions"
Business executives should ask and answer questions concerned with:
- Predicting the shape and duration of each stage
- Determining a product's current stage in the cycle
- Making use of this assessment
Identifying the stage of a product
- Identifying the stage of a product is an art rather than a science.
- It is nonetheless possible to find patterns in some of the general product features at each stage.
- Identifying product stages when the product is in transition is very difficult.
- More recently, it has been shown that user-generated content (UGC) (e.g., in the form of online product reviews) has the potential to reveal buyer personality characteristics, which can in turn be used to identify the product life cycle stage.