📊 What is the BCG matrix?
Big Idea: The BCG (Boston Consulting Group) matrix is a 2×2 grid that helps businesses manage their product portfolio by classifying products based on market share and market growth. 🧮
It helps answer: Which products should we invest in? Which should we drop?
Classify products by market share (x-axis) and market growth (y-axis)
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⭐🐕 The four quadrants
⭐ Stars (high share + high growth)
- Market leaders in a fast-growing market
- Generate high revenue BUT need heavy investment to maintain position
- Strategy: invest to keep them growing — they are the future cash cows
🐄 Cash cows (high share + low growth)
- Market leaders in a mature (slow-growing) market
- Generate lots of cash with little investment needed
- Strategy: milk them — use the profits to fund Stars and Question Marks
❓ Question marks (low share + high growth)
- Small share in a fast-growing market — potential but uncertain
- Need heavy investment to grow share, but might fail
- Strategy: invest selectively or divest — decide carefully
🐕 Dogs (low share + low growth)
- Small share in a stagnant or declining market
- Generate little cash and have little future potential
- Strategy: divest or discontinue — unless they serve a niche
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🔄 How to use the BCG matrix
- Analyse the whole product portfolio — not just one product
- A healthy portfolio has a mix: cash cows funding stars and promising question marks
- Too many dogs = the business needs to innovate
- No stars = the business has no future growth products
- Helps prioritise where to invest and where to cut
Example: A hotel chain might classify its luxury suites as a Star (high share, growing market), standard rooms as a Cash Cow (high share, stable market), and a new budget range as a Question Mark.
⚠️ Limitations
- Only uses two measures — market share and market growth (ignores profit, brand strength, etc.)
- Assumes high market share = high profitability (not always true)
- Hard to accurately measure market share and growth in some industries
- Static snapshot — products move between quadrants over time
- 'Dogs' may still be valuable for brand completeness or niche markets