A cross-reference guide for the Modern Problem Solver. Framework Chapter Use Case The 5-Whys 3 Finding the root cause of a recurring failure. The 70% Rule 5 Making fast decisions without 100% of the data. The OODA Loop 16 Navigating high-pressure, fast-moving crises. Inversion 4 Preventing failure by imagining the worst-case scenario. The 80/20 (Pareto) 18 Finding the high-leverage actions in health and work. One-Way vs. Two-Way Doors 5 Determining if a decision is reversible or permanent. Resource Mapping 7 Auditing your capital, time, and energy leaks. The Shield (Automation) 9 Creating systems so the problem never returns. The Eisenhower Matrix 15 Solving "busy-ness" through aggressive prioritization. The BATNA 21 Gaining leverage in any negotiation or conflict. The 3-2-1 Ru

