Now you open your and navigate to the “Human Factors” section. You see several possible specific root causes:

Consider the root cause "hot/cold" under the Work Environment category. The dictionary provides specific yes/no questions to determine if this is a valid root cause:

To get the most out of your TapRooT® tools, keep these rules in mind during your next investigation:

The story of the is a decades-long narrative of turning advanced human factors research into a practical "expert system" for safety and reliability. The Origin: From Nuclear Navy to Industry