AirPlan Engineering Services

Your Partner for Mechatronic System Development, Certification & Safety

Together with an improved interface and many other enhancements, version 9 now includes a FMECA module which fully conforms to the ISO 26262 and IEC 61508 standards. This enables a full top-down modelling from Hazard Analysis to FMECA in compliance with these standards.

FMECA Module:

Two FMECA calculation modes are implemented, 'Basic Mode' and 'Advanced Mode - Split and Hit'.

Basic Mode

  • Fully automatic calculation of ISO-Metrics with newly developed top-down algorithm.
  • No tedious bottom-up categorisation of each individual fault.
  • Software logic of functional network checks all faults for ISO 26262 specifics and categorizes these automatically.
  • No custom input required.

Advanced Mode

  • Customization of ISO-Engine.
  • Two custom selectable ISO 26262 analysis engines available:
    • Basic Engine with standard FMEA Quantification.
    • Advanced Engine - taking onto account multiple, different end effect severities per failure mode and applying a proportional failure rate algorithm.
  • Optional IEC 61508 engine and MIL-STD-1629 analysis at a mouse click.
  • Calculating failure rate metrics at the failure mode and hardware level automatically.
  • New synoptic to visualize detectability and diagnostic test entries.
  • Enhanced GUI for diagnostic test data entry.
    • Diagnostic tests are available from a sub-form drop down to improve/facilitate definition and assignment of diagnostic tests to failure modes.
  • New components to model safety goals, safety requirements and safety functions within FMECA module for requirements traceability.

Enhanced Grid View

  • ISO 26262 hazard analysis has an enhanced, fully customizable grid view (database view) to cover allocation of Severity, Exposure, Controllability and ASIL via combo-fields.

Transferring and Linking FMECA to Fault Tree

ITEM ToolKit now contains an automatic interface to transfer and link from FMECA to Fault Tree, with options of ISO 26262 and IEC 61508 compatible transfer:

  • FTA modelling with all failure rate categories as calculated in FMECA.
  • Automatic truncation mechanism in accordance with ISO 26262 failure rate categories:
    • Automatically creating failure rate category 'Super Events'.
    • Automatically creating modular FTA sub-tree to limit FTA size.
    • Automatically producing ISO 26262 FTA conformity results per failure metrics.
  • Automatic transfer from database fields between modules (FMECA to FTA) for traceability (i.e. automatic FTA Gate Severity / ASIL identification by traceability to corresponding FMECA Failure Mode).
  • New ISO 26262 / IEC 61508 conformity CCF model. (Beta-Plus)

Fault Tree:

  • Filter function has been added in the Gates and Events List view/editing dialog to allow users to filter gates/events by name. (New Feature)
  • New Event tab has been added in Failure Model Library dialog to allow the user to assign Failure Model to a group of events. (New Feature)
  • In previous version, if users copied a Fault Tree system from Library to a different Project, the Fault Tree system name would be renamed automatically. This has been improved to keep the original name if the system has been pasted to a different Project. (Improvement)
  • A new option has been added to the right mouse click options for Repeat Gates on the Fault Tree Diagram, to “Show All Repeats”. (New Feature)
  • IEC-61508 SIL Requirement section has been added in the Fault Tree system dialog to allow the user to set the SIL Requirement at system level. System Risk Reduction Factor is also calculated and displayed within Fault Tree system dialog.
  • When user select Ctrl+F5 to reset all links and check duplicate IDs, additional dialogs have been added to display the duplicate ID found. (Improvement)
  • Fault Tree events with a regular analysis failure model assigned can be switched to “Working House Mode” to exclude them form the cut set analysis and be re-activated by setting them to “Failed House Mode”, which then automatically uses the assigned failure model for quantification. This facilitates parametric system studies significantly.
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