Ask your COO: How long can the invoicing system be down before we lose revenue? Not what the SLA says, but the actual business tolerance.

This is the hardest psychological shift. Stop designing your architecture assuming you will never be hacked. Design it assuming the attacker is already in the network today.

To effectively implement a resilience strategy, the distinction between "security" and "resilience" must be clear.

| Feature | Cyber Security (The Shield) | Cyber Resilience (The Armor & Recovery) | | :--- | :--- | :--- | | Primary Goal | Prevention of intrusion. | Survival and continuity of operations. | | Mindset | "Keep the bad actors out." | "Assume they are already in; how do we keep running?" | | Metric | Number of blocked attacks, uptime %. | Time to recover (RTO), impact reduction, adaptability. | | Focus | Technology & Perimeter. | Process, People, & Business Function. |