SILcet is an advanced software solution for the SIL Verification of Safety Instrumented Functions (SIFs), developed in alignment with IEC 61508, IEC 61511, and ISA-TR84.00.02 requirements.
It supports rigorous, traceable calculations to demonstrate compliance throughout the SIS lifecycle and is offered in two complementary formats.
- SILcet Cloud is a web-based version featuring a modern, intuitive interface, with calculations executed on secure cloud infrastructure.
- SILcet Pro Plus is a Windows-based, Excel-driven version that operates locally, using embedded Excel macros to perform all SIL calculations.
Both versions are based on the same validated calculation equations, ensuring consistency and equivalence of results across platforms.
SILcet Cloud represents the natural cloud-based evolution of SILcet Pro Plus, whose first release dates back to 2018 and has been successfully applied in numerous real-world SIL verification projects since then. This evolution is the result of a strategic collaboration between Positive Engineering and Enertria (safetyandsis.com), an agreement that further strengthens the long-term continuity, technical robustness, and ongoing development of both tools.
SILcet Cloud
- Web-based SIL verification platform accessible via standard browsers
- Centralized project environment with multi-user access and collaborative workflows
- Two integrated device databases:
- User-defined database, fully importable from Excel, allowing reuse of corporate or project-specific data
- Built-in SILcet database with more than 300 real devices, plus generic device data.
- Customizable report generation, allowing personalization of report content and language
- Bidirectional data exchange with Excel:
- Export of complete projects and user databases to Excel
- Import of projects and user databases from Excel files
- Designed for scalability, supporting large SIF inventories and multiple projects
- Continuous feature evolution without local installation or manual upgrades.
More information:
- More technical details and functional description at SILcet Cloud — Functional Safety
- Pricing plans, licensing, and direct access to the platform at SILcet Cloud.
SILcet Pro Plus 8
- Excel-based SIL verification tool running locally on Windows PCs
- Calculation engine implemented through embedded Excel macros, enabling full offline operation.
- Calculation structure with direct visibility of Input parameters, final results and other data.
- Flexible data entry well suited for detailed engineering studies and customized workflows.
- Strong alignment with Excel-based documentation, review, and engineering practices.
- Proven application in real industrial SIL verification projects since its first release in 2018
- Direct control over files and data, simplifying reviews, audits, and long-term project archiving.
Further details, licensing, and documentation:
Common Technical Capabilities (Both Versions)
- SIL verification of Safety Instrumented Functions in accordance with IEC 61508, IEC 61511, and ISA-TR84.00.02
- Identical and validated calculation equations used in both platforms, ensuring equivalent and consistent results.
- Support for a wide range of voting architectures, including:
1oo1, 1oo2, 2oo2, 2oo3, 2oo4, 1oo1D, 1oo2D, 2oo3D, 2oo4D, 1oo3, 1oo4, 1oo5, 3oo3, 4oo4, 5oo5, 6oo6, 3oo4, 3oo5, 4oo5, and general MooN architectures - Comprehensive parameter modeling, including:
- Failure rates: SD, SU, DD, DU
- Element type: Type A / Type B
- SC, Cpt, TI, LT, Beta factor
- MTTRdd, Start-up Time
- Transmitter diagnostic configuration
- Calculation of key functional safety metrics:
- PFDavg for low demand mode
- PFH for high demand mode
- STR / MTTFS
- Architectural Constraints requirement.
- Structured, traceable, and auditable calculation methodology suitable for:
- Design verification
- Independent reviews
- Functional Safety Assessments
This common technical foundation ensures that the choice between Cloud and Excel deployment is purely operational, without any compromise in calculation rigor, compliance, or technical depth.
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