The BCG Matrix in Practice: Stars, Cash Cows, Dogs and Question Marks

The BCG Matrix, created by the Boston Consulting Group in 1970, helps a company decide where to invest across a portfolio. It plots each product on two axes: market growth (how fast the market is expanding) and relative market share (how strong your position is).

The four quadrants

Stars — high growth, high share. Winners worth investing in, but hungry for cash.

Cash Cows — low growth, high share. Mature winners that generate more cash than they consume; milk them to fund the Stars.

Question Marks — high growth, low share. Could become Stars or fail; they demand a decision, not drift.

Dogs — low growth, low share. Usually candidates to divest or wind down.

The traps

The matrix is a conversation starter, not an oracle. Market share is not the only source of advantage; a “Dog” can be strategically vital if it locks in a key customer. And “milking” a Cash Cow too hard can starve it into decline. Pair the BCG view with the GE/McKinsey Matrix, which uses richer axes, and the Ansoff Matrix when the question is how to grow rather than what to hold. Browse them all in the Strategy library.