Book excerpt: Although aviation is among the safest modes of transportation in the world today, accidents still happen. In order to further reduce accidents and improve safety, proactive approaches must be adopted by the aviation community. The International Civil Aviation Organization (ICAO) has mandated that all of its member states implement Safety Management System (SMS) programs in their aviation industries. While some countries (the United States, Australia, Canada, members of the European Union and New Zealand, for example) have been engaged in SMS for a few years, it is still non-existent in many other countries. This unique and comprehensive book has been designed as a textbook for the student of aviation safety, and as an invaluable reference tool for the SMS practitioner in any segment of aviation. It discusses the quality management underpinnings of SMS, the four components, risk management, reliability engineering, SMS implementation, and the scientific rigor that must be designed into proactive safety. The authors introduce a hypothetical airline-oriented safety scenario at the beginning of the book and conclude it at the end, engaging the reader and adding interest to the text. To enhance the practical application of the material, the book also features numerous SMS in Practice commentaries by some of the most respected names in aviation safety. In this second edition of Safety Management Systems in Aviation, the authors have extensively updated relevant sections to reflect developments since the original book of 2008. New sections include: a brief history of FAA initiatives to establish SMS, data-driven safety studies, developing a system description, SMS in a flight school, and measuring SMS effectiveness.