Twelve Common Human Error Preconditions

According to Skybrary, The Human Factors “Dirty Dozen” refers to twelve of the most common human error preconditions, or conditions that can act as precursors, to accidents or incidents.

These twelve elements influence people to make mistakes. The Dirty Dozen is a concept developed by Gordon Dupont, in 1993, whilst he was working for Transport Canada, and formed part of an elementary training program for Human Performance in Maintenance. It has since become a cornerstone of Human Factors in Maintenance training courses worldwide

The original list, developed for aircraft maintenance includes the following 12 common human errors:

  • Lack of communication
  • Distraction
  • Lack of resources
  • Stress
  • Complacency
  • Lack of teamwork
  • Pressure
  • Lack of awareness
  • Lack of knowledge
  • Fatigue
  • Lack of assertiveness
  • Norms

If you would like to get more in-depth knowledge on these 12 errors, it is available on the Skybrary website.

Human Factors Safety Training

Human Factors safety training is a key element in addressing Human Factor error preconditions. The ACI Human Factors Safety Training course helps airports build strong defences against human errors by enhancing the awareness of factors that can impact performance and lead to errors.

This online course provides participants with a comprehensive introduction to the primary concepts of human factors and ensures that they can recognise, understand and prevent human errors on the airside. On completion of the course, all participants will be able to apply basic human factors strategies to their airport industry work.

The course covers the following topics:

Section 1. Understanding Human Factors
– Understand the importance of learning about Human Factors
– Define Human Factors
– Understand the importance of Human Factors in relation to safety
– Know and describe the components of the Human Factors SHEL model

Section 2. Human Factors and Airport Safety
– Understand the relationship between Human Factors and Safety Management Systems
– Describe the key Human Factors that influence the effectiveness of a Safety Management System
– Describe the key human factors that influence human performance

Section 3. Dealing with Human Factor Errors
– Understand how errors occur due to latent conditions and active failures
– Explain the two main sources of human factor errors
– Understand the three main strategies for dealing with human factor errors