BCG Matrix
Boston Consulting Group Growth-Share Matrix
What is the BCG Matrix?
- Sort businesses into four quadrants by growth and share
- Fund stars with cash cow profits
- Know the limits of a two-axis view
The moment you bring out the BCG Matrix, the language of the meeting changes. Until then, business-unit discussions drift toward “are we in the black or the red this year?” This tool instead splits each business into those that generate cash and those that absorb it. Some loss-making businesses deserve more investment, and some profitable ones deserve no more money—and a single chart makes that judgment visible. A room where business-unit heads defend their own results turns into one where they argue over where the whole company’s cash should flow.
Both axes have conventional cutoffs. The usual boundaries are 10% annual market growth on the vertical axis and 1.0x relative market share on the horizontal axis. Relative share is not absolute share but your share divided by the largest competitor’s share; if you are the leader, you divide by the runner-up’s. A 20% share is only 0.5x if the leader holds 40%, so it falls on the left. Each business is drawn as a circle sized to its revenue, so you see its weight at a glance. Adjust the cutoffs by industry; in mature industries, a 5% growth rate is sometimes used as the boundary. The GE-McKinsey nine-box matrix, which rates market attractiveness and business strength on several qualitative indicators, is a separate tool designed to address the simplicity of these two axes.
The most common slip in practice is reading 'dog = exit' at face value. Suppose you hastily shut down a business that has low share but has already recovered its fixed costs and keeps loyal customers, quietly throwing off a little cash. The factory overhead and sales network costs it was helping carry shift onto the remaining businesses and erode the profitability of even a healthy cash cow. Halting investment in cash cows entirely is another common mistake. Neglect equipment and cost improvement for three to four years and that business quietly slides into the dog quadrant. Spreading small investments across several question marks is the same trap: none crosses the threshold, and a few years later all of them become dogs. Also watch for internal politics that define the market narrowly to turn one’s own business into a star.
John KimAuthor of B2B Marketing Design and CEO of Nanum Consulting
Eunpyo HongExpert in company analysis, startups, and venture fundraisingA business portfolio analysis framework devised around 1970 by Bruce Henderson, founder of Boston Consulting Group (BCG). By structuring the resource allocation problem of diversified companies around two axes, growth rate and share, it became one of the best-known tools in the history of strategy consulting.
Let’s look at a hypothetical case: Company A, an industrial materials manufacturer with 480 employees and KRW 180 billion (≈ US$134,670,100) in annual revenue. It runs seven product lines, and for three years it had invested KRW 2 billion (≈ US$1,496,300) a year evenly in each of three new businesses, yet none had passed break-even. The CEO set up a three-month portfolio restructuring task force.
- The head of strategic planning pulled the market growth rate over the past three years and the relative market share versus the top competitor for seven product lines and plotted them. The result: 1 star, 2 cash cows, 3 question marks, and 1 dog.
- Looking at the industrial filter business, with 12% growth and 0.3x relative share, the head of new business asked, "We put in KRW 6 billion (≈ US$4,489,000) over three years and it’s still a question mark?" It then emerged that the budget had been spread evenly, KRW 2 billion (≈ US$1,496,300) each, across three question marks.
- The CEO decided to stop investing in two of the three Question Marks and concentrate three years of funding on one filter business, and the finance team allocated KRW 9 billion (≈ US$6,733,500) of the KRW 21 billion (≈ US$15,711,500) in operating cash flow generated by the two Cash Cows.
- When the Cash Cow business head protested, “You’re just taking all our money,” the agreement stated in writing that the business’s equipment maintenance and cost-reduction budget of KRW 2.5 billion (≈ US$1,870,400) a year would be left untouched, preventing the Cash Cow from sliding into a Dog.
- Instead of withdrawing the legacy product line classified as a dog, the company converted it to OEM and cut fixed costs. A year later, relative share in the filter business rose from 0.3x to 0.7x, and company-wide operating margin improved from 6.1% to 8.4%.