Bow Tie Methodology (BTM) consists of two methods, Fault Tree Analysis (FTA) and Event Tree Analysis (ETA), which are connected by a single event. The methodology is holistic and provides the tools and pre-event analysis, which is also called the risk calculations, and post-event analysis, also called the risk mitigations, of quality and safety related events. There are plenty of articles or chapters on this methodology, however there is no book that covers everything in one place. The book is filled with examples taken from the aviation industry and elaborates theory implemented in practice, which gives quality and safety practitioners a guidance on how to use and apply BTM in practice.


Sasho Andonov is a Graduated Engineer in Electronics and Telecommunications and has earned a Master Degree in Metrology and Quality Management at Ss. Cyril and Methodius University in Skopje, Macedonia. Sasho has 21 years’ experience in aviation, especially in the area of ATM/CNS, Quality and Safety Management and 10 years’ experience in standardization and accreditation. He is a member of the technical board in the electro-technics, information technology and telecommunications area of the Institute of Standardization of Republic of Macedonia and a member of the Sectors Committee for electrics, electronics and electrical machines of the Institute of Accreditation of Republic of Macedonia.Sasho has contributed to 11 international conferences and symposiums with his papers mostly in area of satellite navigation, calibration and safety, and quality management.