exida - SILStat - Evaluate Risk Reduction

Maximizing Risk Reduction through Collection and Analysis of Operation & Maintenance Data


Operation & Maintenance Data Collection with SILstat

SILstat™ simplifies the recording of safety critical events during your lifecycle processes, helping validate assumptions made during analysis and design of the SIS. The resulting data helps with optimization of the current SIS or design of a new system.  

SILstat™ allows you to be compliant with requirements outlined by the IEC 61511 / ISA 61511 standards and with an OSHA Process Safety Management (PSM) Mechanical Integrity Program.  

Aligned with exSILentia version 4, SILstat™ allows you to seamlessly transfer project data creating a Plant Hierarchy and Library that acts as the backbone for your SILstat™ database. 

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Data Collection

SILstat supports the capture, documentation, and classification of the following life events: Hazardous Events, Device Failures, Proof Tests, scheduled Maintenance activities, and ad hoc Maintenance events.

Data Flow

Much of the required SILstat™ configuration can be built automatically through a simple transfer of exSILentia data. This not only reduces application setup time cost but improves traceability between safety system design and operation and maintenance.   After the data is transferred, you will be able to easily configure SILstat™ to fit your needs. 


exSILentia data is the backbone for your SILstat™ Plant Hierarchy. This provides easy navigation to your Safeguards, Devices, Hazards, and Procedures. Each change to the database is auditable and traceable to the user. 


SILstat™ guides you through a step-by-step workflow for your safety critical events. Users can define workflows for certain events, including mandatory reviews and approvals. 

Device Lifecycle 

Within SILstat™ , events for each of your devices can be captured. These include Install, Bypass, Replace, Repair, and Remove events. These events will be automatically added to a Device Timeline for easy lifecycle visualization.  

Data Evaluation

Capturing operation and maintenance data (events) for plant equipment provides the ability to evaluate the actual risk reduction achieved.

Level of Actual Risk Reduction Provided Actions
Protection is adequate Continue data collection
Protection is inadequate Process hazard risk is higher than expected or SIF is under designed to protect against the process hazard. return to Analysis phase for redesign and implementation.
Protection is more than adequate SIF is over-designed to protect against the process hazard or process hazard risk is lower than expected. Allows modification of design practices for future applications and potential for cost savings.