An improved system safety Analysis Method based on Accimap

As a systems-based technique for accident analysis, Accimap involves the construction of a multi-layered diagram in which the various causes of an accident are arranged according to their causal remoteness from the outcome. Though there is systematic research and development for this technique, Accimap is inadequate in terms of the contributory factors identified. This paper presents a modified Accimap by integrating a representative second generation human reliability analysis method(CREAM: Cognitive Reliability and Error Analysis Method) into the traditional Accimap, using the methodology of trace analysis. This paper applies the modified method to analyse the Black Hawk Fratricide Incident from a more comprehensive view of the accident and also for the effectiveness and validation of the method.Within the innovative views of the contributory factors in hierarchy such as the planning, management, and regulatory bodies, the modified Accimap will be more advisable to be used for analyzing accidents in the complex social-technical system.