Functional Safety Suite is a tool for calculations in the field of functional safety.

It does not only provide all relevant models for quantitative risk evaluation, including

• Event trees
• Fault trees - with extensions for detailed modeling of diagnosis, restoration and more by Monte-Carlo simulation
• Markov models - with extensions for transitions described by probabilities and restorations at discrete times
• Reliability block diagrams

but also provides a tool to describe the architecture of safety functions by a schematic, with automatic conversion to fault trees.

See the Features page for more information.

Functional Safety Suite Licensing

Functional Safety Suite is not open source, but free of charge.

To obtain a license for full functionality of Functional Safety Suite for free, please write to fusasu@thomas-brunnengraeber.de. Previous licences will work for version 7.1 as well.

Please state the name of your company or for which purpose you intend to use Functional Safety Suite. You’ll receive the license within three days typcially, except when I’m in holidays or on a business trip.

Without a license, you’ll notice the following differences:

• Disclaimer shown at program start.
• Export of graphics, reports and some data not enabled.
• Some conversions not enabled.

Version 7.1

New in version 7.1

Monte-Carlo simulation of fault trees is now not only running nVIDIA GPUs or Microsoft Windows OS, but also on CPUs and GPUs supporting OpenCL 2.1 (with SPIR-V), i.e. most INTEL or AMD CPUs and GPUs, independent of the OS.

Version 7.0

New in version 7.0

Main new feature is the evaluation of fault trees by Monte-Carlo simulation. With Monte-Carlo simulation, gates are no longer restricted to boolean gates. The new gate types are

• DIAGNOSIS
• DIAGNOSIS-INHIBIT
• DIAGNOSIS-AND
• VOTING-AND
• REPLACEMENT
• DIAGNOSIS-AND-REPLACEMENT
• PRIORITY-AND
• SEQUENTIAL
• SPARE
• RESTORATION_ON_SAFE_FAILURE

With these gates, the exact behaviour of diagnosis, fault detection and reaction (technical and operational) can be modeled, for example. The model should therefore be viewed more as a notation for describing behavior than as a Boolean combination of events.

Changes in version 7.0

• File format changed for all files. XSD schemes provided for all file formats.
• Library extension changed from .lib to .gbes in order to pass Email filters.
• Most parameters defined per model instead of project level.
• PAND gates only supported in Monte Carlo simulation.
• Fields are shown in orange background before Enter is pressed.
• In event trees: small probabilities are shown in exponential form (instead of “0.000”).
• Fault trees and Markov models: h_sys corrected in transient evaluation, better precision of F(t) and f(t)

Version 6.1

Update in Version 6.1.1

• The starter FunctionalSafetySuite_6.1.exe has been re-compiled in order to get rid of security alerts.

New in version 6.1

• Heatmap-like background in event trees
• Bundle including a JRE and a starter file provided for MS Windows instead of an installer

Version 6.0.2

New in version 6.0.2

• Conversion of 3-input Inhibit Gates (If-Then-Else-Gates) to Markov models

New in version 6.0

• Architectures: Automatic creation of fault trees based on block diagrams.
• Floating window: Show two models on your monitor(s).
• Interationalization: Descriptions can be entered and saved in multiple languages, the selected one will be shown.
• Copy chart axes configuration from one chart to another chart.
• The User Interface Look & Feel can be selected.

Bugfixes in version 6.0.2

• Text size in DrawingML exports corrected

Bugfixes in version 6.0.1

• remove unnecessary warnings in fault tree evaluation
• correct position of vertical text in DrawingML
• adjust width of text fields in properties panel

Bugfixes in version 6.0

• Scaling for high resolution displays corrected.
• Export to docx updated due to new XML schemes of MS Word.

Email: fusasu@thomas-brunnengraeber.de