Product & the Product Life Cycle
The Product Is the Heart of the Marketing Mix
Price, promotion and place all matter — but none of them help if the product itself is wrong. The OCR specification places product at the centre of the marketing mix for a reason. A great advert cannot save a poor product, and a strong product will often sell even with a modest marketing budget. The spec asks you to understand three things about a product before a business even launches it: how it is designed, whether it is truly new (invention) or an improvement (innovation), and how it changes over its life cycle.
Design, Invention and Innovation
Design is where a product begins. Good design balances how the product looks, how it works, what it is made of, and how much it costs to make. Dyson is a British case in point — James Dyson spent five years and more than 5,000 prototypes designing the first bagless vacuum cleaner. The vacuum worked, but it also looked different to every other cleaner on the shelf, which helped it stand out.
There is a useful distinction between invention and innovation. Invention is creating something genuinely new — the first bagless vacuum, the first iPhone, the first electric car. Innovation is improving or adapting what already exists — Apple innovates new iPhone models every year, each better than the last, but none is as new as the original 2007 launch. Most successful UK businesses are innovators rather than inventors, because improving a known product is much less risky than inventing a category customers have never seen.
Design, invention and innovation shape what the product does — which in turn decides the price customers will pay and the promotion needed to sell it. A highly innovative product can charge a premium and justify heavy launch advertising; a mature product may need price cuts to stay competitive.
Invention creates something genuinely new (the first iPhone, Dyson’s bagless vacuum). Innovation improves or adapts what already exists (the iPhone 16, Dyson’s latest cordless model). Most successful UK businesses innovate rather than invent — it is faster, cheaper and safer.
Products Have a Life Cycle
Every product goes through stages over time — it is launched, grows, peaks and eventually declines. The product life cycle (PLC) is the model businesses use to track this journey and decide what to do at each stage. Understanding the cycle stops a business pumping money into a declining product or charging too little for one that is about to take off.
The OCR specification names four stages: introduction, growth, maturity and decline. (You do not need to draw the PLC curve in the exam — the focus is on understanding what happens to sales and profit at each stage, and how the business should respond.)
The Four Stages
Introduction — the product has just launched. Sales grow slowly as customers hear about it for the first time. Prices may be set high (to recover development costs) or low (to pull shoppers away from rivals). Advertising spend is heavy. The business often still makes a loss on the product at this stage. The Nintendo Switch was a classic introduction phase in 2017 — heavy promotion, slow build-up, limited stock.
Growth — sales rise quickly as word spreads and rivals start to react. Profit turns positive as the fixed development costs spread across more units. Tesla’s Model Y has been in growth since launch, with sales climbing each year as more customers choose electric.
Maturity — sales peak and flatten. The market is saturated, competition is fierce, and prices may need to fall to keep customers. The iPhone has been in maturity for several years — annual refreshes keep sales steady rather than booming. At maturity, businesses often respond by refreshing the product (new packaging, new flavours, new features) or cutting the price to hold on to customers.
Decline — sales fall as customers move to newer products. Nokia’s dominance of mobile phones in the 2000s collapsed into decline once Apple and Samsung launched smartphones. At decline, a business must decide whether to withdraw the product, sell it off cheaply, or give it one last refresh.
The four stages of the product life cycle in order are: introduction, growth, maturity and decline. You do not need to draw the PLC curve — you need to say what happens to sales and profit at each stage, and what the business should do in response.
How Businesses Respond at Each Stage
Each stage needs a different response. At introduction, the priority is awareness — heavy advertising and sometimes a big launch event. At growth, the priority is capturing market share before rivals catch up — the business may invest in more production capacity and broader distribution. At maturity, the priority shifts to defending sales — refreshing the product, adjusting the price, rewarding loyal customers. At decline, the business must decide: refresh one more time, sell the product off at a discount, or withdraw it and redirect resources to newer products.
Cadbury’s Dairy Milk has been sold in the UK since 1905 and is a good illustration. Constant product refreshes — Fruit & Nut, Whole Nut, Caramel, Oreo, plant-based versions, limited-edition flavours — have repeatedly pulled it back from the edge of decline and kept it in maturity. Not every product can be saved like this: Blockbuster Video simply could not refresh DVD rental once streaming arrived, and declined into closure by 2013.
Product Differentiation and USPs
Every good product stands out from rivals in some way. A USP (unique selling point) is the feature that gives customers a reason to pick this product over the alternatives. BrewDog’s USP was craft beer with stronger flavour than mainstream UK lagers. Dyson’s USP was bagless cleaning. Tesla’s USP was electric cars that could actually go 300 miles on a charge. A strong USP means the business can charge a higher price and attract loyal customers — and it is far easier to design a USP in at the start than to bolt one on when the product is already in maturity.
Most businesses sell more than one product. Their product portfolio is the full collection. A healthy portfolio has products at different life cycle stages — so as one declines, a younger one is rising to take its place. Apple has the iPhone in maturity (steady profit), the Vision Pro headset in introduction (high spend, low sales), and the iPod, which it withdrew in 2022 once the line reached decline. Balancing the portfolio means the business always has something earning now and something growing for the future.