88. People make predictable types of errors

88. People make predictable types of errors

• Decide which possible errors you are most concerned about and which are important to fix first.
• Collect data on which category of errors people are making.
• This will help focus your redesign efforts after testing.
• Use systems like HFACS (slide 4) to analyze and prevent errors, especially if errors may result in injury or death.
• Giphy (video/mp4)
• Caption: https://gph.is/2aEsxuw

Types of Errors

• Performance Errors
• Mistakes you make while you’re going through the steps to complete a procedure.
• Commission, Omission, and Wrong-action.
• Motor-control Errors
• Errors you make while using the control of a device. For example, accidentally swiping when you mean to zoom.
• Use the flashcards to learn the definitions and get real-life examples.
• 88. Performance error definitions
• 88. Performance error examples

Swiss Cheese Model of Human Error

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• Caption: https://stratog.rcog.org.uk/human-factors/clinical-error/swiss-cheese-model
• Prof James Reason's Swiss Cheese Model (Embed)
• Caption: In his book Human Error (1990) James Reason wrote that errors have a cumulative effect. Each error makes a hole in the system until the end when you have swiss cheese.

HFACS

• In 2000 Scott Shappell and Douglas Wiegmann wrote a paper on The Human Factors Analysis and Classification System for the US office of Aviation Medicine. They worked from the Swiss Cheese Model and extended it to propose a system for analyzing and classifying human errors.
• See the video for an in-depth explanation.
• HFACS-D Research - User Level Survey (Embed)