Strategy Diamond vs. Porter's Five Forces

Porter's Five Forces (competitive rivalry, supplier power, buyer power, threat of substitution, threat of new entry) is a framework for analyzing how attractive and profitable an industry structure is likely to be. It is fundamentally an external, industry-level analysis.

The Strategy Diamond operates at a different level: it defines a specific company's strategy — where it will compete, how it will get there, how it will win, in what sequence, and through what economic mechanism. It assumes some understanding of industry structure but focuses on the firm's specific choices rather than the industry's overall shape.

In practice, the two are complementary rather than competing: Five Forces analysis can inform which arenas look attractive (an input to the Strategy Diamond's 'arenas' facet), while the Strategy Diamond translates that industry understanding into a complete, actionable strategy.