exSILentia - Integrated Safety Lifecycle Tool

exSILentia is a comprehensive suite of software tools designed to streamline the implementation of functional safety activities as per the IEC 61508 and IEC 61511 safety standards. These standards apply to industries such as process, oil and gas, petrochemical, and chemical industries.

The software is developed by exida, a leading organization in functional safety, cybersecurity, and alarm management.


exSILentia software supports all stages of the safety lifecycle, including:

  1. Risk Analysis: The software can be used to perform risk analysis methods like Layers of Protection Analysis (LOPA), to identify and assess process risks and determine necessary safety functions.
  2. Safety Integrity Level (SIL) Selection: exSILentia helps determine the required SIL for each safety function, based on the risk analysis.
  3. SIL Verification: Once safety functions and associated systems are designed, exSILentia can verify whether they meet the required SIL. The software uses failure rate data to calculate the Probability of Failure on Demand (PFD) or the average frequency of dangerous failures.
  4. Architecture Design and Optimization: exSILentia’s SILver module helps in the selection and arrangement of components in the Safety Instrumented System (SIS) to ensure it meets the required SIL.
  5. Operations and Maintenance Planning: The software assists in developing operation and maintenance plans for the SIS, including proof testing plans.
  6. Lifecycle Cost Analysis: exSILentia also provides a cost analysis function that calculates and compares the lifecycle costs of different safety system designs.

The integrated approach offered by exSILentia ensures consistency in the functional safety process, saving time, and reducing the chance of errors compared to using separate tools for each safety lifecycle stage. The software is commonly used by safety engineers, consultants, and end users involved in functional safety activities.

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