Variable Logic: Estimated year when a Cryptographically Relevant Quantum Computer (CRQC) achieves the capacity to compromise ECDSA-256 via Shor's algorithm. This is the "T-Zero" event where current public-key infrastructure is mathematically compromised.

Market Inertia: The duration between the initial quantum threat manifestation and the achievement of critical mass in post-quantum migration. High latency indicates a slow institutional response, leading to a wider "Vulnerability Gap."