The PQC Migration Playbook is a structured roadmap for moving an organization's cryptography to a quantum-safe footing. It lays out twelve steps across five phases, beginning with the groundwork: setting up governance and a Post-Quantum Centre of Excellence, defining a cryptographic policy, building a full inventory of where cryptography lives across the estate (the CBOM), and assessing which systems and data face the most quantum risk. From there it moves into prioritizing what migrates first, reviewing each system's technical complexity, and testing post-quantum algorithms in a sandbox before anything touches production. The later steps turn strategy into execution through a sequenced migration plan, building crypto-agility so algorithms can be swapped without major redesign, engaging vendors and supply chain partners, and planning fallbacks for when timelines or technology shift. It closes with a continuous review cycle that keeps the inventory, risk view, and roadmap current, turning a one-off project into a lasting capability. The throughline is practical and risk-based: find what you have, protect the most important things first, and stay ready to adapt.
