Human error is implicated in nearly all aviation accidents, yet most investigation and prevention programmes are not designed around any theoretical framework of human error. Appropriate for all levels of expertise, this book provides the knowledge and tools required to conduct a human error analysis of accidents, regardless of operational category (military, commercial or general aviation). The book contains a complete description and domestication of the Human Factors Analysis and Classification System (HFACS), which incorporates James Reason's model of latent and active failures as a foundation. Widely disseminated among military and civilian organizations, HFACS encompasses all aspects of human error, including the conditions of operators and organizational failure.