Fault Tree Analysis Software

Kenexis Arbor™ is a full featured Fault Tree Analysis application built with the process safety engineer in mind.  Arbor provides users with an environment for developing complex system reliability models through a simple and efficient interface.  Arbor takes the pain out of building and managing fault tree analysis models by integrating seamlessly in the Kenexis Instrumented Safeguard Suite environment, leveraging the power of other best in class Kenexis applications.


  • Designed by Process Safety Engineers, For Process Safety Engineers
  • Robust Minimum Cut Set Analysis Reporting
  • Utilization of the Kenexis Database of Failure Rate Data
  • Integration with Vertigo SIS Lifecycle Management Software

Designed for Process Safety

Like all application in the Kenexis Instrumented Safeguard Suite™, Arbor was developed with one goal in mind:  empowering engineers to perform their work in the most accurate and efficient possible way.  This is achieved by including our own process safety engineers in the development process, helping to identify requirements for the application and ensuring continual improvement based on user feedback.

Robust Minimum Cut Set Reporting

Allows users to quickly identify vulnerabilities in the system design by viewing details of the minimum cut set analysis through a clear and interactive interface.  Provides valuable statistical analysis of the system highlighting the details of most significant combinations of events which could result in system failure which streamlines the process of sensitivity analysis and evaluation of alternative designs.

Utilization of the Kenexis Failure Rate Database

Kenexis builds and maintains an extensive database of failure rate data for instrumentation and controls equipment.  A License to Arbor comes with full access to this database at no additional cost.  Data can quickly be gotten, processed and applied in fault tree analysis within a matter a few simple mouse clicks, eliminating the time-consuming task of developing failure rate models for your fault trees.  Our engineers use this data every day to perform a variety of process safety studies so you can be sure that the data have been well vetted and is always current.

Integration with Vertigo

Arbor extends the functionality of the Kenexis Vertigo™ SIS Lifecycle Management software by providing an environment to perform complex SIL Verification calculations.  By default Vertigo will perform SIL Verification Calculations in conformance with the recommended practice of ISA TR84.00.02 Safety Instrumented Functions (SIF) – Safety Integrity Level (SIL Evaluation Techniques Part 2: Determining the SIL of a SIF via Simplified Equations.  For complex systems, this recommended practice is not sufficient.  Integration of the Arbor Fault Tree Analysis application allows you an SIS designer to quickly and easily verify system designs regardless of the complexity of the system failure modes.  Fault Tree Analysis results from Arbor are easily linked to Safety Instrumented Functions in Vertigo for reporting purposes.

Comprehensive Software Environment

Kenexis Arbor™ Fault Tree Analysis application is part of the Kenexis Instrumented Safeguard Suite™ (KISS). This suite of tools allows users to create and verify design basis calculations and specifications for the full range of instrumented safeguards including SIS, FGS, alarm systems and more. This suite of tools is available through Kenexis’ unique cloud based model and is accessed by any licensed user on any computer, tablet, PDA, or even smartphone through a standard browser. The unique architecture ensures that your software is always available and up to date with the latest performance metrics and equipment databases, removing the IT burden of hardware and software maintenance while allowing you to leverage Kenexis resources for project assistance, outsourcing, and verification and certification of your analyses. The software environment includes:

  • Compatibility with most browsers in most operating systems
  • Extensive standard and custom equipment databases
  • Detailed technical documentation and help
  • Dedicated help desk and support
  • Reports and graphical results output and export