A Method for Identification and Quantification of Latent Weaknesses in Complex Systems

Abstract:

A method for identification of latent weaknesses is proposed and its use illustrated in a case study. The method is a qualitative upgrade of probabilistic safety assessment, using its results in the form of risk-significant components identified through a logical model. The identification of latent weaknesses is made during meetings of the relevant staff who have authority to influence the status of these components. The groups of key organisational factors influencing the component status are identified and it is judged how well they are implemented. In the same way weak points of the management system and latent weaknesses are also taken into account. The method was applied on four occasions. It proved to be efficient, fast and user-friendly, if the organisation of the analysis is correctly implemented, and taking into account the reluctance of some participants to put their knowledge at the disposal of a group understanding of complex technological system.