Free Management Guide

OT Asset Inventory
and Device Management
Guide

A complete guide to building, maintaining, and operationalizing an OT asset inventory — the foundation of every OT security and compliance program.

6Step Build Process
35+Checklist Items
14Asset Register Fields
FreeNo Cost
Management Guide
OT Asset Inventory and Device Management
  • Why inventory is the foundation of OT security
  • What to include in an OT asset register
  • Step-by-step inventory build process
  • Device lifecycle management framework
  • 35+ item compliance checklist
  • IEC 62443 and NERC CIP mapping

What is inside this guide?

You cannot protect what you do not know exists. This guide gives OT security teams a structured process for building and maintaining an asset inventory that meets IEC 62443, NERC CIP, and NIS2 requirements.

01
Why Asset Inventory Is the Foundation
Why every major OT security framework starts with asset inventory, and what happens to vulnerability management, patch management, and incident response when the inventory is incomplete.
02
What to Include in an OT Asset Register
A 14-field asset register template covering asset type, firmware version, zone assignment, criticality rating, vendor support status, remote access paths, and more.
03
Step-by-Step Inventory Build Process
A 6-step process from scope definition through passive network discovery, physical walkdown, documentation reconciliation, criticality classification, and register finalization.
04
Device Management Lifecycle Framework
Security requirements at every stage of the device lifecycle: procurement, installation, operation, maintenance, end of life, and decommissioning — with the most common gaps at each stage.
05
OT Asset Inventory Checklist
A 35+ item checklist across inventory completeness, data quality, vulnerability tracking, and maintenance — mapped to IEC 62443-2-1, NERC CIP-002, and NIST SP 800-82.
06
How Arista Cyber Builds OT Asset Inventories
Our asset discovery, criticality classification, CVE mapping, and ongoing asset management services for industrial operators.
Suitable for
OT Security ManagersPlant and Site OperationsCISO and IT/OT TeamsCompliance and Audit FunctionsSystem Integrators
OT Security SpecialistsServing oil and gas, energy, manufacturing
IEC 62443 and IEC 61511Cybersecurity meets functional safety
30+ PlaybooksFree resources for OT security teams
Training PlatformTUV Rheinland certified OT security courses