pmprompt Domain Context
This skill implements a proven product management framework. The approach combines best practices from industry leaders and is designed for practical application in day-to-day PM work.
Input Requirements
- Context about your product, feature, or problem
- Relevant data, research, or constraints (recommended but optional)
- Clear articulation of what you're trying to achieve
7 Powers: The Foundations of Business Strategy
What It Is
7 Powers is a framework for understanding sustainable competitive advantage. The core insight: Business value comes from possessing an attribute that produces higher returns than competitors AND a barrier that prevents competitors from arbitraging it away.
Power = Benefit + Barrier
Warren Buffett famously said: "In business, I look for economic castles protected by unbreachable moats." Power is understanding what makes something a castle (the benefit) versus a shack, and what makes the moat unbreachable (the barrier).
The key shift: Move from asking "What's our competitive advantage?" to asking "What economic structure creates durable differential returns?"
When to Use It
Use 7 Powers when you need to:
- Evaluate a business's long-term defensibility (investment decisions, competitive analysis)
- Design a startup for durability (not just product-market fit)
- Understand why incumbents can't respond to your disruptive move
- Prioritize strategic initiatives based on what builds power
- Identify whether you actually have a moat or just operational excellence
- Plan second acts (new business lines that could develop power)
- Win market share battles in high-growth phases
When Not to Use It
- You don't have product-market fit yet
- The business is purely commodity with no differentiation possible
- You want to justify a strategy you've already decided on
- You're optimizing operations (power is about structure, not execution)
Resources
Books:
- 7 Powers by Hamilton Helmer
- Good Strategy Bad Strategy by Richard Rumelt
- Competition Demystified by Bruce Greenwald