When determining the code for a root cause, use the following order:

First question: Is this cause a technical factor?
      If yes, then select the appropriate technical code
      If no, ask the second question.

Second question: Is this cause an organizational factor?
      If yes, then select the appropriate organizational code
      If no, ask the third question.

Third question: Is this cause a human factor?
      If yes, then select the appropriate human code
      If no, then select the patient-related or unclassifiable code.