A tool to help you in your interpretation of human behaviour.
You want to get a feel about how to interpret the behavior of a person related to a safety event. Remember, do not use the outcome of the safety event to judge the behavior of the individual. Just because the explosion was very big does not mean that the people involved were very bad! So look at the action or intention, not at the consequences.
At http://www.safetyandjustice.eu/index.php/d-navigator you will find a useful tool to assist in your interpretation of the intent of the behaviour if you have difficulty in assessment.