Authors: Zacharias Dermatis, Panayiotis Papageorgiou, Panagiotis Liargovas
Title: A Risk Computation Procedure for Maritime Security Assessment
Abstract
The aim of the proposed study is to address the issue of maritime security through the development of a method applicable to the maritime industry that evaluates and manages maritime security related risks. Security Cost-Benefit Analysis and Decision Making procedure will be required also. In fact there is no extensive and in-depth literature for the risk acceptance criteria concerning maritime security. Basic information is drawn from other areas, such as civil aviation. It is necessary to standardize these criteria, as is the case with the Formal Safety Assessment, gathering information from the past.
The proposed method uses the Bow-Tie diagram tool for the estimation of the risk. A risk computation procedure is described after the application of a set of prevention barriers, which is based mainly on the accuracy of the definition of the Probability Pi and the Contribution Ci of each Threat (i) as well as on the accuracy of the estimation of the Effectiveness value Eij, of each Prevention Barrier (j) for the same defined Threat (i), by the user. Similarly, the risk computation for each consequence, after the application of a set of mitigation barriers, is based mainly on the accuracy of the definition of the Risk Value RVi of each Consequence (i) as well as on the accuracy of the estimation of the Effectiveness value Eij, of each Mitigation Barrier (j) for the same defined Consequence (i), by the user.
The results of the risk computation appear in the Bow-Tie diagram providing a coloured scheme of the obtained risk values for top event and consequences, after the introduction of the necessary prevention and mitigation barriers.
Maritime Security, Security Assessment, Bow-Tie diagram
