. "F Event Sequence Diagram Method and Risk ScenarioDevelopment." Risk of Vessel Accidents and Spills in the Aleutian Islands: Designing a Comprehensive Risk Assessment - Special Report 293. Washington, DC: The National Academies Press, 2009.
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Risk of Vessel Accidents and Spills in the Aleutian Islands: Designing a Comprehensive Risk Assessment
FIGURE F-1Event sequence diagram method.
of output lines, depending on whether the pivotal event occurs (Yes output) or otherwise (No output). The same applies in the case of conditions where Yes means the condition is satisfied and No means the opposite.
An event sequence diagram, therefore, is a visual representation of a set of possible risk scenarios originating from an initiating event. Each scenario consists of a unique sequence of occurrences and non-occurrences of pivotal events (Point B or C in Figure F-1). Each scenario eventually leads to an end state, which designates the severity of the outcome of that scenario.
