Functional Safety Suite

Functional Safety Suite 4.0

This is a tool for calculations in the field of functional safety.

Model types:

Main characteristics and abilities:

Minimum System Requirements

To run Functional Safety Suite you'll need a JAVA(TM) virtual machine (JVM, also called JAVA Runtime Environment, JRE) on your computer. You can check the version by typing "java -version" on the command line, it should be 1.8.0_111 or higher (the full version string is displayed, the main version is the second number in the string). If Java is not installed or an older version is installed, please download the newest version from

Functional Safety Suite 4.x has been tested to run on Microsoft Windows 7 with JRE 8 update 111 (1.8.0_111).


For Microsoft Windows, an installer is provided, that will guide you through the installation. Just download the .jar file to any directory and double-click on the .jar file. If the Java Runtime Environment (JRE) is installed correctly, the installation will start. If nothing happens, please check your JRE installation. This will be necessary anyhow in order to start Functional Safety Suite.

If for some reason the installer doesn't work, or if you don't use MS Windows, please download the .zip file instead and extract it to some folder. A directory "FunctionalSafetySuite_4.x" will be created with some sub-directories. The only difference is, that no shortcuts/links will be created.

Legal aspects

The complete license is part of the download (see file "license.txt"). The following is only a short excerpt.

Functional Safety Suite 4.x including the documentation is provided "as is" without any warranty to their performance, correctness or fitness for any particular purpose. The licensee assumes the entire risk as to the quality and performance of the software. In no event shall the author or anyone else who has been involved in the creation, development, production, or delivery of this Software be liable for any direct, incidental or consequential damages, such as, but not limited to, loss of anticipated profits, benefits, use, or data resulting from the use of this software, or arising out of any breach of warranty.

Functional Safety Suite 4.x Demo Edition

Differences between the Demo Edition and the official version:

To obtain a license for full functionality of Functional Safety Suite, please write to

The file 'fusasu_4.0.2_installer.jar' includes the program, the documentation (pdf and html) and some examples.

If the installer doesn't work for your system, please use the .zip file instead:


Event tree:

Screenshot event tree

Fault tree:

Screenshot fault tree

Reliability block diagram:

Screenshot reliability block diagram

Markov model:

Screenshot Markov model

Complex component:

Screenshot complex component model

Chart of complex component values:

Screenshot complex component chart

Old versions

Functional Safety Suite 4.0.1

This version is replaced by 4.0.2, see above.

Functional Safety Suite 3.3.2

It is recommended to upgrade to version 4.x since version 3.x is no longer maintained.

The file 'fusasu_3.3.2_installer.jar' includes the program, the documentation (pdf and html) and some examples.

If the installer doesn't work for your system, please use the .zip file instead:

Please read the documentation first.

Copyright 2019 by Thomas Brunnengräber, Munich, Germany