Which item is NOT listed among the methods or models in the material?

• A. Root Cause Analysis
• B. Three Levels of Incident Causation Model
• C. Why Method
• D. OSHA's problem-solving techniques

Answer: (A)

Recognizing how the material categorizes tools helps you see what counts as a named method or model. In this material, the explicitly listed options are the Three Levels of Incident Causation Model, the Why Method, and OSHA's problem-solving techniques. Root Cause Analysis isn’t presented as its own listed method or model in that material. It’s a broad concept many investigators use and can be part of other approaches, but the material doesn’t name it as a separate item. The other two—three levels of incident causation and the Why Method—are described as distinct techniques, and OSHA’s problem-solving techniques are documented guidance. So Root Cause Analysis is the one not listed.