What constitutes an 'investigation plan' and who should approve it?

• A. A checklist of actions to be performed daily.
• B. A memo describing only the incident summary with no data collection plan.
• C. A document outlining scope, roles, data collection methods, timeline, and expected outcomes; approved by management or safety leadership.
• D. An informal note written by the investigator with no formal approval process.

Answer: (C)