Scope the program around critical functions, the most exposed access paths, and the changes that are safe to implement within OT operational constraints.
A workable SCADA security program begins with defining what is in scope and what 'good' looks like for the environment: which systems, sites, networks, and roles are included, and which outcomes are required (availability targets, safety requirements, regulatory expectations, and incident response readiness).
Next, focus the scope on realistic attack paths and operational risk. Remote access, engineering workstations, vendor connections, and network interconnections typically drive exposure. By mapping these pathways, you can prioritize controls that reduce risk quickly without requiring disruptive system changes.
Finally, translate scope into governance and a change plan: owners, decision rights, acceptable downtime windows, and validation steps. This turns 'security intent' into an implementable program that operations can support and sustain.
Over-scoping early creates a plan no one can execute. Start with the highest-impact pathways and the most critical processes, then expand systematically once controls and operating rhythms are established.
“A SCADA program succeeds when scope matches operational reality.”
Expert Trainer
Expert Trainer
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