ITEM TOOLKIT

162 ITEM ToolKit Getting Started Guide
Field
Analyst
Compiled by
Approved by
Unavailability Cut-Off
Sort Cut Sets
Order Cut-Off
Use Max Risk Dormant Model
Life Time
No of Intermediate Time Points
Description
Function Description
Notes
Failure Rate
Failure Frequency
No. of Expected Failures
Mean Time Between Failures
Total Down Time
Mean Time to Repair
Unreliability
Unavailability
Quantification Method
Modularize Independent Sub-block
Description
The person performing the RBD System Analysis
The person who gathered the system data for the RBD Analysis
The person required to sign off on this system
Restricts the extent of the analysis
Sort cut sets in required order
Set the maximum order cut sets that should be considered during analysis
Uses maximum risk values for dormant events
Time over which analysis takes place
Calculates system parameters at set intervals during lifetime
Description of the system
What the system does
Any comments or pertinent information pertaining to this system
Conditional failure intensity
Unconditional failure intensity
Number of system failures over system lifetime
Average time between system failures
Total time the system will spend unavailable during the system lifetime
Average time to repair system
Probability of system failing one or more times during system lifetime
Probability of system being unavailable at any specific time
Click on the selected Quantification method and select the MTBF Options
Group independent sections of the RBD, speeding up the analysis
Adding Blocks, Nodes and Connections
B A C
What is a Block?
Blocks (A) represent events such as sub-system and component failures. The unique IDs distinguish blocks from other
blocks in a diagram. Repeating a block throughout the diagram can represent common cause failures.