This document provides information on accident investigation, including definitions, objectives, processes, and techniques. It begins with defining key terms like accident, near miss, first aid case, lost day case, injury, and illness. It then explains the objectives of accident investigation are to prevent reoccurrence, identify areas for improvement, and demonstrate management commitment to safety. The document outlines the general process of accident investigation including securing the area, gathering facts, identifying the root cause, and implementing corrective actions. It provides guidance on gathering facts at the scene, interviewing witnesses, and documenting evidence. Identification of root causes is discussed along with tools like the 7-step problem solving methodology.