9.8 Human error Flashcards
1
Q
What does SHELL model stand for
A
Software, Hardware, Environment, Live-ware
2
Q
What does PEAR model stand for
A
People, Environment, Actions, Resources
3
Q
Explain the ‘Swiss Cheese Model’ approach
A
aims to reduce the chances of human error by implementing more safeguards
4
Q
Explain the ‘Error chain’
A
Accidents that involved a series of human factor problems . (Preventative measures should have been implemented earlier to break the chain)
5
Q
What are ‘slips’
A
- Actions which were not carried out as intended or planned
- Occur during task execution
6
Q
What are ‘Lapses’
A
- Missed actions and omissions
- Occur at storage (memory) stage
7
Q
What are ‘Mistakes’
A
- error caused by a faulty plan or intention
- Occur at planning stage
8
Q
What are ‘violations’
A
- deliberate ‘illegal’ actions
9
Q
Explain what constant errors are
A
- Follow a certain consistent , systematic pattern
- Can be predicted
10
Q
Explain what variable errors are
A
- Cannot be forseen and are much harder to manage
11
Q
What is a type 1 error
A
- When a good item is incorrectly identified as faulty
12
Q
What is a type 2 error
A
- When a fault is overlooked
13
Q
What is a routine violation
A
- Practices that have become ‘the normal way of doing something’
- e.g. cutting corners to save time
13
Q
What are optimising violations
A
- Breaking the rules for fun
14
Q
What are exceptional violations
A
- Tasks or operating circumstances where violations are inevitable
