Isolation planning is the заранее? no, in English. It's the advance design of how to separate vital systems from the rest of an environment during a cyber incident. In practice, defenders decide which networks, controllers, identities, supplier links, and remote access paths can be cut off without stopping essential operations. In OT and other high-availability environments, this matters because a fast disconnect can prevent lateral movement, contain malware, and limit the blast radius of a breach.
Good isolation planning maps dependencies before an incident happens, so teams know what must stay online, what can be segmented, and what can be safely taken offline. It often includes segmented networks, one-way communication where appropriate, emergency access controls, and criteria for manual fallback. During attacks, the plan guides incident responders in isolating affected zones before disruption spreads. During recovery, it helps restore service from trusted systems without reconnecting compromised components too early.