Streamlining IEC 62443 OT Cyber Risk Assessments | exSILentia Cyber | exida

exida Recorded Webinars

From HLRA to DLRA: Simplifying OT Cyber Risk Assessment with exSILentia Cyber

Recording Date: March 2026

Considering a Cyber Risk Assessment and don’t know where to start - well we have news for you!

We gathered feedback from both our customers and our own Engineering teams on usability improvements and features, and our software team has delivered!

Allow us to introduce our new revision of exSILentia Cyber with new dedicated HLRA (High Level Risk Assessment) and DLRA (Detailed Level Risk Assessment) worksheets. This new structure follows the IEC 62443-3-2 OT Cyber Risk methodology where an initial Cyber Risk Assessment (HLRA) can first be carried out, followed by a DLRA. Data gathered during the HLRA can be easily brought into the DLRA using smart linking functionality.

We have added many features including:

HLRA:

  • Zone Specific Navigation Tree Layout
  • Dedicated columns for Devices, threats, and Consequences as well as Non-Hackable Protections
  • See your Risk score throughout the process against your risk categories (e.g. Business impact, Safety, environmental - all completely configurable)
  • Dedicated column for device-based recommendations

DLRA:

  • New DLRA Threat column allowing entry of bespoke device threats
  • Link the original HLRA Cyber Consequence into your DLRA Consequence worksheet with ease, using our linking functionality
  • Create and build a library of custom countermeasures which can be reused through the DLRA process where applicable
  • Build custom countermeasure and categories that align with IEC 62443-3-3 foundational requirements  

For both HLRA and DLRA, you can now set a default likelihood during risk setup, which allows each new iteration to be set with an initial likelihood. This can of course be changed after as required.

Join Dwane Shelton as he walks us through a live example of both a High and Detailed level Risk Assessment using our new release of exSILentia Cyber

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About the Presenter:

Dwane Shelton

Dwane Shelton Dwane Shelton, CFSP, CACS, ILP, is a Senior Safety, Cybersecurity & Alarm Engineer at exida IRL Ltd with over 15 years of operational experience across the medical device, life sciences, power, oil and gas, and automotive industries. He specializes in functional safety, OT cybersecurity, and alarm management, delivering gap assessments, risk assessments, SIL/PL analysis, and compliance with key international standards including IEC 62061, ISO 13849, IEC 61511, IEC 62443, and ISA 18.2/IEC 62682.