ITEM TOOLKIT

Chapter 12 Event Tree 263
11. Enter your system information by placing the cursor or clicking in the appropriate fields.
12. The information entered here is for the system level. The following table describes what could be entered and what
each field and block of fields pertains to:
Field
Title
Name
Part Number
LCN
Circuit Ref
Analyst
Compiled by
Approved by
Mission / Life Time
Quantification Method
Cut-Off
Sort Cut Sets
Description
Function Description
Notes
Uncertainty
Miscellaneous
Description
System Title
Unique Reference Identifier for the System
System Part Number
Logistic Control Number
Circuit Reference Number
Name of the person performing the Event Tree Analysis
Name of the person who gathered the data for the Event Tree Analysis
Name of the person who was required to sign off on the project
Project lifetime given in hours and the total number of immediate time points
Select one of the two methods
If you select the Probability box, enter the unavailability and the Frequency cut-off rate for
this project. Click the Order box to have an Order Cut-Off, and then enter the cut-off value for
this project
Select whether you wish to Sort Cut Sets by unavailability, by frequency, or by order and
enter the maximum amount of sort sets. Click “Off” if you do not wish to use Sort Cut Sets
Enter the description for this System
Enter the purpose/Description of this system
Enter any other pertinent information about this system
Click this box if you wish to perform an Uncertainty Analysis. If you select this box, you must
then enter the Sample Size and the Percentile
Select the option you wish to use
Editing the Event Tree Diagram
Creating an Event Tree system automatically generates a default Diagram starting at the left side with an initiating event
column (A) followed by 3 events column (B, C, D), the consequence column (E) and the result column (F). Click on the
Event Tree Diagram view (G) to see the diagram.