The Growth Share Matrix

1. Cash cows (high market share, low industry growth)

These units typically generate cash in excess of the amount of cash needed to maintain the business. They are regarded as staid and boring, in a "mature" market, and every corporation would be thrilled to own as many as possible. They are to be "milked" continuously with as little investment as possible, since such investment would be wasted in an industry with low growth.

2. Dogs (low market share, low market growth)

These units typically "break even", generating barely enough cash to maintain the business's market share. Though owning a break-even unit provides the social benefit of providing jobs and possible synergies that assist other business units, from an accounting point of view such a unit is worthless, not generating cash for the company. They depress a profitable company's return on assets ratio, used by many investors to judge how well a company is being managed. Dogs, it is thought, should be sold off.

3. Question marks (low market share, high industry growth)

These are growing rapidly and thus consume large amounts of cash, but because they have low market shares they do not generate much cash. The result is a large net cash consumption. A question mark has the potential to gain market share and become a star, and eventually a cash cow when the market growth slows. If the question mark does not succeed in becoming the market leader, then after perhaps years of cash consumption it will degenerate into a dog when the market growth declines. Question marks must be analyzed carefully in order to determine whether they are worth the investment required to grow market share.

4. Stars (high market share, high industry growth)

The hope is that stars become the next cash cows. Sustaining the business unit's market leadership may require extra cash, but this is worthwhile if that's what it takes for the unit to remain a leader. When growth slows, stars become cash cows if they have been able to maintain their category leadership, or they move from brief stardom to dogdom.

Most companies have their portfolio of businesses scattered through all four quadrants of the matrix. The success is to achieve balance. The goal of the company must be to maintain position in the cows , but also to remember not to reinvest in them too much. The cash generated by the cash cows should be used as a first priority to maintain or consolidate position in those stars which are not self sustaining. Any surplus can be used to fund selected question marks. Also all companies have some dog businesses – there is nothing wrong about that as the absence of dogs indicates that the company has not been sufficiently adventurous in the past. It is essential however that the weak dog position is correctly recognized

As a particular industry matures and its growth slows, all business units become either cash cows or dogs. The natural cycle for most business units is that they start as question marks, then turn into stars. Eventually the market stops growing thus the business unit becomes a cash cow. At the end of the cycle the cash cow turns into a dog.

The overall goal of this ranking was to help corporate analysts decide which of their business units to fund, and how much; and which units to sell. Managers were supposed to gain perspective from this analysis that allowed them to plan with confidence to use money generated by the cash cows to fund the stars and, possibly, the question marks. As the BCG stated in 1970:

Only a diversified company with a balanced portfolio can use its strengths to truly capitalize on its growth opportunities. The balanced portfolio has:

• stars whose high share and high growth assure the future;

• cash