exSILentia - Integrated Safety Lifecycle Tool

Cut Project Time and Eliminate Rework

Streamline the Process Safety Management work process and the Safety Instrumented System Functional Safety Lifecycle with exSILentia.


exSILentia is exida’s response to the pressing need for comprehensive safety lifecycle management solutions to manage the increasingly prescriptive safety regulations and standards.

The ARC View - February 2018

exSILentia® streamlines the Process Safety Management work process and the Safety Instrumented System Functional Safety Lifecycle by providing:

  • Easy to use best-in-class tools
  • Intelligent lifecycle knowledge integration
  • Ground breaking enterprise leverage

exSILentia - the Enterprise Safety Lifecycle Solution   

Easy to Use Best-In-Class Tools

The exSILentia software suite is made up from a collection of Best-In-Class tools that:

  • Ensure compliance to current standards
  • Embed industry best practices
  • Generate complete documentation on a work process by work process basis


Intelligent Lifecycle Integration

The exSILentia suite integrates the individual tools to create a project model with an Intelligent Data Core that:

  • Seamlessly flows data throughout the project
  • Eliminates duplicate data entry
  • Captures and institutionalizes corporate knowledge.

Ground Breaking Enterprise Leverage

The exSILentia Intelligent Data Core facilitates movement of data within a project and throughout an enterprise making possible:

  • Data imports from other tools
  • Population of control system alarm databases
  • Automatic configuration of safety instrumented systems
  • Access of tool, project, or enterprise data by CMMS or ERP platforms.

Data Core Features

Data Core Library

Event frequency and industry failure databases are accessible with the click of a button, reducing time required to complete analysis and design calculation.

User inputs are stored in enhanced libraries for quick reference and re-use such as causes, safeguards, hazard scenarios, recommendations, etc.

Risk Matrix

Project specific definitions of likelihood, severity, as well as the risk matrix can be customized by the user to accommodate different processes and company standards.

Reports are generated automatically to document and communicate the findings of each task, allowing project personnel to move quickly to the next phase.

DeltaV™ SIS Configurator

The exSILentia® DeltaV™ SIS Configurator plug-in takes a conceptual design, configured in the SIL verification tool SILver™, and converts that configuration into application program logic for use in a DeltaV™ SIS system.

The SIL verification of a conceptual design is a key step in the safety lifecycle. In order to determine the achieved SIL, users must model the structure of a SIF and account for application level settings. The completed conceptual design defines the input requirements for the application program to be created in the logic solver.

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  Current Version
exSILentia 4.13.6

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Informational Webinar

Reducing Project Lifecycle Cost with exSILentia

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Scalable Solution

exSILentia can be scaled to fit your project and budget needs.


Licensing is based on the number of users using the software concurrently.

No Limits

For each license, there are no limits to the number of projects analyzed. Each project can have an infinite number of SIFs identified, modelled, and monitored making it the most cost effective solution.

The Breakdown

exSILentia is a modular suite of tools available in five different bundles:






Lifecycle Activity Module Functionality PHA LOPA PHA+LOPA Alarm Standard Analysis Operation Ultimate Enterprise
Functional Safety Management, Auditing and Assessment IEC 61511 Compliance Documentation Checklist for Documenting Compliance with IEC 61511 Standard
Hazard & Risk Assessment (Process Hazard Analysis) PHAx Record results of Process Hazards Analysis (PHA) / Hazard and Operability Study (HAZOP)        
Allocation of Safety Functions to Protection Layers (SIL Target Selection) LOPAx Likelihood Analysis    
SILect Safety Integrity Level (SIL) Selection (Risk Graph, Risk Matrix, Frequency Based Targets)        
SILAlarm Alarm Rationalization per ISA 18.2, EEMUA 191            
Safety Requirements Specification (SRS) Process SRS Process level Safety Requirements Specification        
Design and Engineering of SIS (incl. SIL verification) SILver Safety Integirty Level Verification, IEC 61508 compliant calculation engine        
SERH Viewer Viewer for exida Safety Equipment Reliability Handbook database (over 2000 devices)        
Lifecycle Cost Estimator Evaluate Lifecycle cost of proposed SIF designs            
Design SRS Detailed Design level Safety Requirements Specification              
SRSC&E Creation of SIF and SIS Cause & Effect              
Operation and Maintenance Proof Test Generator Creates proof test procedures for each component (organized by SIF)            
Modification SILStat Recording of SIF life event data (proof test results, failures, demands) for comparison of actual to expected performance                
Verification Built-in Peer review capability based on login allows review / approval of tool output

The exSILentia® integrated Safety Lifecycle Engineering Tool is a powerful aid for any engineer involved in safety lifecycle tasks such as SIL selection, Safety Requirements Specification, and SIL verification.

exSILentia Training Courses

exida has developed courses that will familiarize users with all facets of the exSILentia tool to ensure efficient implementation of the Safety Lifecycle tasks.

FSE 242 - Process Hazard Analysis with PHAx

Process Hazard Analysis with PHAx™, FSE 242, details how the exSILentia PHAx™ module can be used to conduct HAZOP methodology based Process Hazard Analysis. This course is targeted towards students that are experienced in process hazard analysis who want to learn how to leverage the advanced features of PHAx™. It will cover how to configure a project, define risk criteria, and use the advanced libraries to store valuable project specific information. The students will learn how to define units, nodes, and how to benefit from the PHAx™ smart deviations. It also addresses how hazard scenarios are to be defined for use in subsequent lifecycle phases.

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FSE 243 - Layer of Protection Analysis with exSILentia®

FSE 243 explains how the exSILentia LOPAx™ module is used to conduct a Layer of Protection Analysis. This course is targeted towards students that have a general understanding of layer of protection analysis and safety requirements specifications who want to learn how to leverage the advanced features of LOPAx™. It will cover how to analyze hazard scenarios considering the frequency of initiating events and the probability of failure for each independent protection layer (IPL) as well as enabling conditions and conditional modifiers. This course will show how to calculate the required Risk Reduction Factor of an IPL and identify Safety Instrumented Functions (SIF). It will teach users how to transfer data from PHAx™ to LOPAx™.

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FSE 244 - SIL verification with exSILentia

SIL verification with SILver™, FSE 244, explains how the exSILentia SILver™ module is used to perform a SIL verification for Safety Instrumented Functions. Students will learn to leverage the tool to model different SIF architectures ranging from simple 1oo1 configuration to more complex examples. This course also covers review of the key parameters that determine the probability of failure of a SIF as well as minimum hardware fault tolerance and systematic capability aspects. It will show the impact of these parameters on the detailed design, implementation, and operation of the SIF. Furthermore, students will learn how to transfer data from the SILver™ module to the Design SRS module and subsequently complete the Design SRS requirements. Finally, the course covers the impact of proof testing and specification of proof test procedures using the Proof Test Generator module.

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