FaultTree+ V11 Summary of Fault and Event Tree Methods Illustrated Using the Current (V10.1) Facilities The FaultTree+ DLL Minor Release Enhancements New Features Scheduled for V11 Open Discussion –Requirements for V11

Summary of Fault and Event Tree Methods

Fault Tree Construction Steps Define system bounds Identify TOP event(s) Identify immediate causes using top-down approach Continue to identify immediate causes through intermediate levels of complexity Terminate roots of fault tree with basic events

Fault Tree Logic Gates

Component Failure/Repair Models Repairable Components Non-repairable Components Non-repairable Components – Phase related hazard (Time at Risk) Hidden or Dormant Failures Failures on Demand, Operator Errors

Minimal Cut Sets Combinations of component failures which cause TOP event Produced using Boolean algebra

Minor Release Enhancements – Are You Up to Date ?

Minor Release Enhancements FaultTree+ now responds to messages from the FaultTree+ developer’s DLL Hardware protection key facilities have been added The calculated parameter Q/T (Unavailability at system lifetime divided by system lifetime) has now been added to gate results and may be displayed in the fault tree diagram or in reports or in the summary results dialog. This parameter has been added to conform to standard ARP4761

Minor Release Enhancements (cont) The BDD (Binary Decision Diagram) calculation method has been added to the program. 8 Custom notes fields have been added to the fault tree event, gate and generic model tables. The field captions may be customised by the user. The ‘Reveal Notes’ menu option has been extended so that the fault tree diagram may display any of the 8 custom fields as the mouse cursor move over gates and events in the diagram.

Minor Release Enhancements (cont) Cut set order fields are now available for fault trees in the report generator and export facilities The fault tree module gate page ordering and filtering facility for printing has been enhanced to allow groups of gates to be moved at once. Also gates connected below a given gate may be selected in one action and moved as a group. Users may now specify the sort field for the grid control in the grid options dialog.

New Features Scheduled for V11

Multiple Project Append A new append function has been added to allow users to append data from a group of projects all in one go. If there is a conflict in data definition (e.g. a gate has the same name in two projects but different inputs) priority is given to the first project in the list. Users may define a list of projects to be appended and save this list in a special template file.

Library Facility Transfer data between library and project : Fault trees Event trees Events CCF Models Generic Models Consequences Bitmaps Markov Models

Grid Filter

Grid Find and Replace

Generic Parameters

CCF Model Extension CCF Models may now be assigned to events with different failure models and/or parameters. Beta Factor Model Multiple Greek Letter (MGL) Model Alpha Factor Model Beta Binomial Failure Rate (BFR) Model

CCF Model Extension

CCF Model Extension

CCF Model Extension

IEC 61508-6 CCF Modelling

IEC 61508-6 CCF Modelling

IEC 61508-6 CCF Modelling

Hyperlinks

Sequential Analysis Extended

Sequential Analysis Extended Sequence data may be automatically assigned when creating Priority AND gates

Confidence Analysis Upper and Lower Bounds Log-Triangular and Log-Uniform Distributions Numerical Integration and Display of General System Distribution Option to take 1 sample only for all events assigned to a single generic model or parameter Correlation Coefficients

Weibull Model

Weibull Model

Phased Analysis

Batch and Partial Runs Batch Runs Partial Runs On specific gate On specific event tree On specific consequence

Multiple Event Groups Easier Navigation Group importance rankings Disjoint event models

Gate and Event Colour Coding

Links to IsoLib Generic data import Project Management NPRD IAEA Electronic Parts Project Management Restricted access Audit trail

Miscellaneous Failure and Success Fussell-Vesely Importance in Reports Risk Cut Sets Added to Summary Dialog Pause Analysis Operates Quickly Diagram may now be sent to clipboard as a colour or black and white metafile Gates are ordered alphanumerically in tree control

Miscellaneous Users may optionally change event tree notation to true/false rather than failure/success Branch probability values may now be shown in the event tree diagram Optional check on whether each event tree enabler column summates to a probability of 1 Results and table dialog may now be resized to full screen

Miscellaneous Cut set lists in the results dialog may now be filtered with partial event names Modularisation options have been improved and simplified