1. 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

2. Summary of Fault and Event Tree Methods

3. 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

4. Fault Tree Logic Gates

5. 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

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

22. Minor Release Enhancements – Are You Up to Date ?

23. 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

24. 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.

25. 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.

26. New Features Scheduled for V11

27. 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.

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

29. Grid Filter

30. Grid Find and Replace

31. Generic Parameters

32. 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

33. CCF Model Extension

34. CCF Model Extension

35. CCF Model Extension

36. IEC CCF Modelling

37. IEC CCF Modelling

38. IEC CCF Modelling

39. Hyperlinks

40. Sequential Analysis Extended

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

42. 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

43. Weibull Model

44. Weibull Model

45. Phased Analysis

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

47. Multiple Event Groups Easier Navigation Group importance rankings
Disjoint event models

48. Gate and Event Colour Coding

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

50. 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

51. 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

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