Inversion & Pre-mortem

Core principle: Instead of asking "how do we make this succeed?", ask "how does this definitely fail?" — then work backwards. Surfaces hidden assumptions, fragile dependencies, and blind spots forward analysis misses.

Two Complementary Techniques

Technique 1: Inversion

Flip the problem. If you want to understand how a system succeeds, first rigorously define how it fails.

Process:

1. State the goal clearly: "We want X to succeed."
2. Invert it: "What would guarantee X fails completely?"
3. List all failure conditions exhaustively — be adversarial, not optimistic
4. For each failure condition: is it currently present, partially present, or guarded against?
5. The unguarded ones become your risk register

Key question to ask: "What assumptions must be true for this to work — and what happens if they're false?"