SILability®

SILability is a powerful desktop software package developed by xSeriCon specifically for SIL (Safety Integrity Level) verification calculations. It is designed to help your engineers execute SIL verification correctly, accurately, and efficiently during the basic design phase of a Safety Instrumented Function (SIF). The software automatically calculates whether your SIF design meets the necessary random hardware failure performance targets and architectural constraints.

SILability comes ready to use with an extensive built-in database containing over 3,000 sets of hardware component failure rates sourced from reliable, publicly available records. Additionally, you have the flexibility to build, save, and manage your own custom user databases alongside the xSeriCon database.

• No Hidden Assumptions: The software intentionally never provides default numerical values, ensuring that no assumed values silently corrupt your calculations.
• Automatic Conversions: Users can enter numerical values in any appropriate unit (e.g., entering test intervals in days, weeks, or years), meaning your engineers don’t have to risk making manual conversion errors.
• Robust Data Checks: SILability features a powerful data check tool that can run an array of consistency and reasonableness checks on your entire project to catch anomalies before you finalize your report.

SILability makes it incredibly easy to export your results. It can automatically generate beautifully formatted Microsoft Excel (.xlsx) reports that include all your input data, calculation results, and any traceability comments your team has added. The column widths are even pre-set for a typical A4 portrait layout so you can easily paste them into your final reports (Microsoft Word documents). You can also export summary lists and generate visual SIF architecture diagrams as png images.

Absolutely. SILability features a unique “Sandbox” function. This allows your engineers to make experimental, temporary changes to the SIF data to instantly see how it affects the overall SIL verification results. Once you are done experimenting, you can either discard the changes to revert your project back to its original state, or choose to keep them.

SILability is fully equipped to support the major international functional safety standards. Your engineers can seamlessly evaluate Safety Instrumented Functions (SIFs) against architectural constraint models, including IEC 61508 (both Route 1H and Route 2H) and IEC 61511 (both the 2003 and 2016 editions). The software adapts to your specific operating modes, calculating the Risk Reduction Factor (RRF) for low demand mode, and the Probability of Failure per Hour (PFH) for high demand or continuous modes to align with standards like IEC 62061.

Absolutely. SILability is built to handle real-world engineering complexity. You can easily model from simple 1oo1 setups to complex voting arrangements like 2oo3 or 4oo4. Even better, it features a highly efficient “Sub-SIF” capability. This allows your team to build a complex subassembly—such as a specialized machine monitoring system—and insert it into multiple different SIFs as a complete module, saving hours of repetitive data entry.

Traceability is critical in SIL verification, and SILability excels in this area. It includes a powerful commenting system where users can attach explanatory notes to almost any data point to record assumptions, identify data sources, or explain discrepancies. Additionally, the software automatically tracks an “edit number” that increments with every calculation change. This ensures that auditors can confidently verify that the final printed report perfectly matches the exact version of your digital project file.

Not at all. We believe your data belongs to your organization. All project data files and custom user databases generated by SILability are saved in Extensible Markup Language (XML). This is a human-readable, highly portable format that makes it straightforward for your IT team to build conversion tools if you ever need to import your data into another application. Furthermore, you can easily export a complete dump of all raw input data and calculated results into standard Microsoft Excel (.xlsx) files, even if your license expired.

Yes! Our expert developers are ready to support your team. We offer comprehensive training not just on how to use the SILability software, but also on the underlying theory and practice of SIL verification and functional safety engineering. Training is flexible and available in both online (distance learning) and traditional classroom formats to perfectly suit your team’s needs.