Idea in short

Michael Porter enjoys near-legendary status among strategists, consultants and analysts. Porter — the Bishop William Lawrence University Professor at The Institute for Strategy and Competitiveness at the Harvard Business School — has indelibly influenced the way we think about strategy not only in the realm of business but also in that of international geopolitics. Porter’s Four Corners Model, which is a framework for thinking about what your competitors’ strategy is likely to be in the medium term future.

It’s a great way of making sure your thinking is structured analytically and that you’re not missing any key factors that might influence your competitors’ decision making. In contrast to Porter’s Five Forces framework, which does not consider competition, the four corners model is based around the competitive forces that shape strategy.

Four Corners Model

Porter’s Four Corners Model

Corner 1: Motivation — Drivers

The important thing to think about here is the way your competitors’ values influence the way they act. What is it that drives them forwards, drives them to compete? How does this motivate and shape their strategy?

Corner 2: Motivation — Management Assumptions

What do they believe about themselves and the world in which they operate? What assumptions have they made about their own strengths and weaknesses in relation to their competitors? Is this likely to make their strategy pro-active or reactive? Aggressive, or defensive?

Corner 3: Actions — Strategy

How do your competitors actually act and are they happy will they be with the efficacy of their actions? Is there a gap between intended strategy and realized strategy? Is there likely to be a sea-change in their strategy due to current lack of success or are they likely to keep moving in the same direction?

Corner 4: Actions — Capabilities

This corner looks at they way in which a competitor might like to act, tempered by a realistic assessment of what they are capable of doing. What are their best options for responding to competition from their rivals? For example are they more likely to respond with a price drop or through aggressively targeting its distribution network?


Think Insights (January 21, 2021) Four Corners Model of competitive strategy. Retrieved from
"Four Corners Model of competitive strategy." Think Insights - January 21, 2021,
Think Insights March 5, 2018 Four Corners Model of competitive strategy., viewed January 21, 2021,<>
Think Insights - Four Corners Model of competitive strategy. [Internet]. [Accessed January 21, 2021]. Available from:
"Four Corners Model of competitive strategy." Think Insights - Accessed January 21, 2021.
"Four Corners Model of competitive strategy." Think Insights [Online]. Available: [Accessed: January 21, 2021]