Accident Investigations (AI) and Operational Safety Reviews (OSR) are valuable for evaluating technical issues, safety management systems and human performance and environmental conditions to prevent accidents, through a process of continuous organizational learning.

This Handbook brings together the strengths of the experiences gained in conducting accident investigations over the past many years. That experience encourages us to undertake analyses of lower-level events, near misses and, adds insights from High Reliability Organizations (HRO)/Learning organizations and Human Performance Improvement (HPI).