Human errors

Question 1

What are the categories of human performance that can lead to errors, defined by James Reason?

Answer 1

• skills-based performance
• Rules-based performance
• Knowledge-based performance

Question 2

What are the types of errors in the generic error modelling system?

Answer 2

• Slips
• Lapses
• Mistakes

Question 3

What is the definition of slips?

Answer 3

the user’s intentions are correct but actions aren’t carried out properly

Question 4

What is the definition of lapses?

Answer 4

Forgetting to perform an action

Question 5

What is the definition of mistakes?

Answer 5

the wrong set of actions are executed due to poor reasoning

Question 6

What are the advantages of the generic error modelling system?

Answer 6

provides a structured framework for designing systems that minimises human errors

Question 7

What are the limitations of the generic error modelling system?

Answer 7

• focuses on non-deliberate errors and overlooks deliberate actions (like taking shortcuts)
• Neglects contextual factors

Question 8

What are the challenges with addressing human error?

Answer 8

• Humans are inherently fallible
• Human behaviour varies significantly
• Emphasises error tolerance over error avoidance

Question 9

How can you plan for errors?

Answer 9

• Increase system visibility
• include errors in training
• Design user-centred interfaces
• Design for errors

Question 10

Why can automation not be the solution to preventing errors?

Answer 10

• Only solves rule-based and skill-based tasks - knowledge-based tasks requires humans
• Processes will be less visible to users, making it harder to troubleshoot
  -Automation can lead to larger design flaws instead of simple human flaws