The document provides an overview of several frameworks and models used for strategic analysis, including SWOT analysis, Porter's 5 forces, and the strategy diamond. It discusses the strengths and weaknesses of each framework. In particular, it explains that while SWOT analysis identifies strengths, weaknesses, opportunities, and threats, it does not provide guidance on what actions to take. The document also discusses different measures of industry concentration, including concentration ratios and the Herfindahl-Hirschman Index (HHI). The HHI gives more weight to larger firms and provides a more accurate picture of competition than concentration ratios alone. Thresholds for the HHI indicate whether an industry is highly competitive or concentrated.