New trends in safety analysis and accident analysis method STAMP/CAST

Abstract

System failures are increasing and problems due to unexpected causes continue to occur. Safety is defined as "freedom from intolerable risk," New analysis methods and accident models for software-centric systems are needed to prevent accidents and losses that could become intolerable risks. This paper describes the original concepts and methods of STAMP (System Theoretic Accident Model and Processes) , resilience engineering, and safety case as new safety analysis methods and models. It also introduces the procedures and characteristics of CAST (Causal Analysis using System Theory) , a new accident analysis method that models from the perspective of the entire system, including people and organizations.