IB Business Management SLTopic 4 — The Seven PsPaper 1 & 2Core idea~10 min read
Product and the Product Life Cycle
Product is the first of the seven Ps and the one everything else hangs off. Change the product and you change the price, the buyer and the advertising with it. This page covers what “product” means in the mix, and the model that explains why a product’s marketing has to keep changing as it ages.
📚 What you need to know
The marketing mix is the seven elements that together make a product sell: product, price, promotion, place, people, process and physical evidence.
Product covers features, design, quality, branding and packaging, and whether these meet customer expectations.
The product life cycle (PLC) describes the stages a product passes through from conception to decline.
The five stages are development, introduction, growth, maturity and decline.
Cash flow and marketing strategy are different at every stage.
Extension strategies stretch the life of a product that has reached decline, and are either product-related or promotion-related.
Real products rarely follow the model neatly — some last weeks, some last a century.
What “product” means in the mix
Product is not just the physical thing in the box. It means identifying the features, design, quality, branding and packaging of whatever is on sale, and making sure they match what customers actually expect.
A bank shows this well. It sells no physical product at all, yet it still designs a range: a basic free account for students, a paid account with travel insurance and better rates for higher earners, a business account with different features again. Each is a separate “product” built for a separate segment.
In an exam, “product” answers should mention at least two of features, quality, design, branding and packaging. Writing only about what the item does misses most of the element.
The product life cycle
Every product has a life. Sales start at nothing, rise, level off and eventually fall. The PLC draws that story as a curve so a firm can see where its product sits and plan accordingly.
The steepest part of the curve is growth. That is when rivals notice the product is working and start copying it.
Stage
What is happening
Cash flow
Marketing strategy
Development
Ideas are generated and screened, then the product is designed and tested
Negative — heavy spending on research and development with no revenue at all
Nothing to sell yet, so the focus is on preparing to create awareness
Introduction
The product is launched and sales grow slowly because it is still unknown
Negative — high spending on promotion, advertising and getting into shops
Build awareness and interest. Use price skimming for innovative products with little competition, or penetration pricing in crowded markets
Growth
Sales rise rapidly as word spreads and the firm builds market share
Turns positive as revenue climbs and fixed costs are spread over more units
Differentiate from imitators, build loyalty, increase advertising and find more distribution channels
Maturity
Sales growth slows as the product reaches peak market penetration
Strongest here — revenue is high and economies of scale have cut unit costs
Defend market share and squeeze profit: promotional pricing, reminder advertising, new channels, small product upgrades
Decline
Sales fall as the product becomes obsolete or is replaced by something newer
Turns negative again as revenue drops but costs of supporting the product remain
Discontinue it, cut the price to clear stock, find new uses, or attempt an extension strategy
The cash flow pattern is the exam gold. Negative, negative, positive, positive, negative. If you can explain why cash is negative at both ends — spending before launch, and falling revenue at the end — you will handle almost any PLC question.
Extension strategies
An extension strategy is a technique used to stretch the life of a product beyond its natural cycle, so that a product reaching decline keeps selling and keeps making a profit. There are two families.
Repositioning is the biggest of these — it changes who the product is for, which usually drags price, promotion and place along with it.
The option students forget: doing nothing. A firm can simply withdraw the product instead of paying for extension strategies. That frees up promotional and development spending for the rest of the portfolio, and in an evaluation question it is often the strongest recommendation.
How well does the model really work?
The curve above is a model, not a law. Product life cycles rarely follow it precisely:
Some are very short. Souvenir merchandise for a one-off national event sells for a few months either side of the day and then stops completely.
Some are extremely long. Chocolate bars and breakfast cereals launched over a century ago are still major brands, kept alive by continuous extension strategies.
Some products never leave introduction. They flop, and the curve simply stops.
Some are revived long after decline, when tastes swing back around.
WORKED EXAMPLE
A sports drink has had sales of 4.1m, 4.3m and 4.2m units over the last three years. Advertising spend has been cut and unit costs are at their lowest ever. Identify the stage of the life cycle and recommend one action. [6 marks]
Step 1: read the sales patternSales have stopped growing and are drifting sideways, not falling sharply. Growth has ended but decline has not started.Step 2: check the other cluesLowest ever unit costs points to economies of scale from high output, and reduced advertising fits a product that no longer needs to build awareness.The product is in maturityStep 3: recommend and justifyA line extension, such as a low-sugar version, would target a segment the current drink misses. It uses the existing brand and factory, so costs are lower than developing something new, and it can lift total sales before decline begins.Step 4: judge itThe risk is cannibalisation — existing buyers switching to the new variant rather than new customers joining. The firm should research whether the demand is genuinely additional first.
💡 Exam tip
Label the axes if you draw the curve: sales on the vertical, time on the horizontal, five stages marked.
Use the numbers in the stimulus to identify the stage. Rising fast means growth; flat means maturity; falling means decline.
Link the stage to cash flow, then to the strategy. That chain is what earns the analysis marks.
Say which type of extension strategy you are recommending, product-related or promotion-related, and why that type suits the firm.
Consider withdrawal as an alternative in evaluation questions. It shows you are weighing options rather than assuming extension is always right.
⚠️ Common mix-up
Confusing the product life cycle with the business life cycle. The PLC follows one product, not the whole firm.
Saying cash flow is negative because sales are low in maturity. Sales peak in maturity — cash flow is at its strongest there.
Treating decline as the moment to launch extension strategies. Most firms plan them during maturity, before sales actually drop.
Assuming all products follow the smooth curve. Length varies enormously and some products skip stages entirely.
Mixing up price skimming and premium pricing. Skimming is a high price for a short period at launch; premium is a high price kept permanently.
Writing that extension strategies are free. Reformulating a product or running a discount both cost real money.
Up next: Managing a Product Portfolio — what a firm does when it has several products at different stages of the cycle at the same time.
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