What problem does it solve? Deciding whether to enter, exit, or invest in an industry requires knowing whether its structure can sustain profits, yet teams routinely mistake fast growth, hot technology, or famous incumbents for attractiveness. This Skill applies Porter's Five Forces rigorously so the verdict rests on evidence, not vibes. ## Core Features & Use Cases - Structured force rating: Rates entry threat, supplier power, buyer power, substitutes, and rivalry Low/Medium/High, each backed by at least three evidenced indicators drawn from Porter's own checklists. - Controlling-force identification: Names the one or two forces that actually govern profitability, tests the verdict against observed long-run margins, and tracks how each force is trending over a stated horizon. - Use Case: A software vendor asks whether to enter the EU regulated-enterprise inference API market in 2027. The Skill fixes the industry scope, names concrete buyer and supplier groups, rates all five forces with evidence, and concludes that supplier power and rivalry capture the profit — pointing to the compliance layer as the defensible position. ## Quick Start Use the five-forces-analysis skill to assess whether the industrial-robotics maintenance market is structurally attractive for a new entrant, rating each force on evidence and naming the controlling force.