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The Boston Consulting
Group Business Matrix

The Boston Square is one of the earliest examples of a qualitative technique for analysing a portfolio of products and factors affecting the pros and cons of a proposed course of action.

It is based on a product life-cycle and the coincidence of high market share with high profitability.

Strategic planning is the systematic and comprehensive analysis needed to develop an action plan for a business.
When integrated with processes for strategic thinking (to identify possible ways a business could evolve) and effective management of change (to counter unplanned threats and exploit unplanned opportunities), it establishes an enterprise's strategy

The product life-cycle assumes that the cost of a unit drops as the volume of units produced increases as a result of improvements in the production process and economies of scale.

Boston Square

Thus a typical product develops from concept to market acceptance - through a period of high demand and eventual market decline. Obviously not all products follow the same cycle - some never reach the market. Other products have a radically different duration for each stage of the life cycle: Some can go through the whole cycle in a year or less whilst the demand for other products endures for decades.

Converting the four stages of the product life-cycle to a matrix which plots market growth against market share results in the "Boston Square" shown above. The characteristic names given to the four cells of the square are part of the reason for the successful adoption of the Boston Square technique.

The 'Stars' are those products with the best profit and potential - but they may also require hefty investment to become established as market leaders. New variants with high value-added features generate growth in market share.

The 'Cash Cows' are established products which generate cash with minimal investment - cosmetic changes rather than new variants are used to maintain market share against competitors using similar tactics to extend the period of cash generations for as long as possible.

'Wild Cats' are those products which demand high investment for little return - i.e. where market growth is high but market share is low. These products are initially funded by income from Cash Cows - until they either become the next generation of Stars (and eventually Cash Cows), or are abandoned in favour of more promising Wild Cats.

The 'Dogs' are those obsolescent products which no longer merit further investment as the market share has been eroded by new developments or fashions.

The Boston Square model highlights that the strategic management of a product (or indeed a whole industry) needs to focus beyond internal factors to consider market pressures. It also stresses the need to re-invest income to provide long-term sources of revenue.
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