Fault Tree Analysis

1
Fault Tree Analysis

• Anna DiRienzo, Katelyn Lesk, Amber Loree, and
  Jude Menie

2
Device Failure Mode
D
C
B
A
3
Mechanical Failures
A
Device not sensitive enough for small pressure
changes
Device cannot support load
Incorrect vertical Tracking system
Incorrect calculation of center of gravity
Failure of L-plate
Failure of Gooseneck to support
Inaccurate weight distribution
Incorrect alignment and/or attachment with iSCAN
4
B
Operator Errors
Incorrect Sterilization
Haphazardly Stored
Incorrect Positioning
Improper cleaning
Too far away from patients eye
Too close to patients eye
Contaminated Device
Missing parts
Device broken
5
Design Errors
C
Attachments
Movement of base while device is in use
Tipping of structure
Operator leans on device improperly
Locking wheels not utilized by operator
Center of gravity off-balance
No enough weight on base
Large adjustment to small adjustment
Large adjustment to IV pole
Small adjustment to device
Material failure
Loose screws
Improper Attachment by Physician
Loose screws
Material failure
6
Material Failure
D
Destabilization
More wear and tear than expected
Fatigue
Gooseneck
Small adjustment
Repetitive use