Description

Enter the FTA Tree description in this text box.

Author

Enter the Author name or names in this text box.

Time

Enter the Mission time (hours) for Q(t) calculation in this text box.

Automatically rearrange the tree

Select this check box if you wish the diagram elements to be automatically rearranged after create/delete operations.

Automatically adjust node font

Select this check box if you wish the diagram element font to be automatically adjusted after creation or editing according to the size of displayed text.

Alignment

Click either Central or Left balanced to define the tree alignment (To select these options, the Automatic Arrangement check box should be selected.)

Show event details

Select this check box if you want to view basic event details (probability model, FR, MTTR etc.) for each basic/undeveloped event

Show codes

Select this check box if you want the element code to be displayed in the element box.

Show Q(mean)

Select this check box if you want the Qmean (mean unavailability, or steady state unavailability) to be calculated and displayed under the element box and in reports.

Show Q(t)

Select this check box if you want the Q(t) (unavailability at time t, or instantaneous, or point availability - probability that a system (or component) will be operational (up and running) at a specific time, t) to be calculated and displayed under the element box and in reports.

Max. MCS number for Cut-Off

Cut-off will be performed only if number of MCS is more than the value entered in this text box. The setting is global for current workstation.

Relative cut-off value

MCS will be deleted if the Q / Total Q (i.e. relative unavailability) is less than the value entered in this text box. The setting is global for current workstation.

Relative cut-off order

MCS will be deleted if its order is greater than the shortest MCS order + specified value. The setting is global for current workstation.

Sensitivity factor

Sensitivity Factor is used for high and low unavailability values for Sensitivity calculation; the default value is 10. The setting is global for current workstation.

Width

Default diagram node box width

Height

Default diagram node box height